Delayed Bag with United Airlines

Today my delayed bag arrived from my United Airlines Flight to Pittsburgh on May 29th. Fortunately, nothing has been stolen from it!

Here's the short story of what happened:

* May 29th, 3pm: Flight UA941 has landed at Chicago O'Hare. I have to go through immigrations (which takes over an hour, since there are clearly too few immigration officers to deal with all the arrivals), and customs. Therefore I have to claim my luggage, bring it through customs, and check it in again. I do get both of the bags I had checked in in Germany, but one is half open. I suspect something might have fallen out, but since immigrations has taken so much time, I decide to check later when I finally arrive in Pittsburgh. I check in my bags again, go through security again and board the flight to Pittsburgh just in time.
* May 29th, 7pm: Flight UA5962 lands in Pittsburgh on time. At the baggage claim, I only find one bag. Mrs Holly P. from UA explains to me, my other bag is still in Chicago. I should describe my bag for her in order for her to write a report and leave a phone number (I give her the number of my future roommate), my bag would be delivered with the next flight from Chicago (that is, 10pm the same day). There is a second guy at the counter who is also missing a bag from the same flight.
* May 29th, midnight: my bag hasn't arrived
* May 30th, morning: www.united.com/bagtrack says that my bag has not been located (huh... it was in Chicago lately...!). I call the customer service. An indian woman explains me that UA does not know where my bag is. I explain I need my bedding equipment. The woman explains that UA can reimburse some of the cost if I have to urgently replace the items in my luggage, but that whatever I buy, I should notify them of before buying. Talking on the phone takes about half an hour.
* May 30th, afternoon: I want to buy bedsheets and the like, and call the UA customer service. Since I am right at the shop, there is no public telephone. An agent from Verizon is friendly and allows me to phone from a phone they have on display in their shop. I end up talking more than 20 minutes (in the shop, with everybody listening) to the indian lady from UA customer service. I then go ahead and buy my stuff.
* May 31st: no sign from my bag
* June 1st: no sign from my bag (and I check www.united.com/bagtrack hourly)
* June 2nd: no sign from my bag. I call an indian lady from UA customer service, to no avail (but again, over half an hour of talking).
* June 3rd: the information on www.united.com/bagtrack has changed, it now says I should write a more detailed report, listing all items contained in my luggage (including purchase date, where purchased and original price) and give proof of ownership for items over 250$. I am busy doing that the whole afternoon, and contact my mother for the details of some items
* June 4th: I am ready to send off my report - however, I have to wait for mail collection on the next day
* June 5th: my report has been sent via registered mail. However, the information on www.united.com/bagtrack has changed - it says my bag has been delivered! How comes I don't know about it? I call the UA customer service again. The indian woman says my bag has been delivered via a delivery company, and she will check with them. Then she comes back to me and tells me they are unreachable. I repeat the process a second time (with a different lady), again with the same result. I provide the ladies with my office telephone number, which I have gotten recently. They are located in a callcenter in New Delhi. Apparently, all calls to the customer service directly go to India.
* June 6th, 11am: The delivery service (called "Wespax") calls! They want to deliver my bag in the evening, but I should call them before they come.
* June 6th, 8pm: As agreed, I call the delivery service. Nobody picks up. I leave a message that I am home and ready to receive the delivery. I call them seven times that evening, nobody picks up.
* June 6th, 10pm: The bag is not there, nobody picks up the phone. I decide to wait at home nevertheless.
* June 7th, 9am: I call Wespax. For some reason, somebody picks up (Allen). He says he is sorry I didn't reach anybody, and that my bag would be delivered today between 10:30 and 14:00. However, they would call me before delivery to make sure I am there.
* June 7th, 11am: Nobody called, even though the delivery guy should be on tour already. I call Wespax. Allen says sorry nobody called me, but my bag would be underway.
* June 7th, 12 am: My bag is finally there! After 9 days!

Conclusion: Better don't fly United Airlines if your luggage is important to you. If you do, don't take any luggage to the check-in. If you do, make sure your luggage carries enough information, and that you have a telephone number in the U.S. where you are available all the time. Re-check the information/slips on your luggage when you re-check-in: the staff from United Airlines will not check.

Update (July 3rd)

I have received a cheque from united airlines for 47$ (expenses for the bedstuff)! Frankly, I was surprised they'd treat me fairly. I will stop my boycott and probably consider flying united airlines again.