[Resolved]  Sony Ericsson — Mobile repair

I purchased SE W300i on October 20, 2006. It worked well for almost a year, but when I tried to turn on the handset on September 30, 2007, it did not start. It screen was turning white and black alternatively.
I took the handset to the SE company repair center at Ripon Street, Calcutta. They took the handset giving me the memory card back and asked me to collect it in 3 days. No temporary mobile was given to me. My work/ job number was E32WK[protected]. When I called[protected] them on Oct 6, 2007 they told me that it would take a few days more and I should call them back later to check its status.
I have been keeping "checking status" since then.
The behavior of the service center people is really disappointing. There is some APARAJITA who hangs up the call at the middle of discussion. Sometimes they keep me on hold for almost 4-5 minutes. Sometimes they refer me to TANIA MITRA/ MOITRA, who is supposed to be handling my case, but unfortunately she is never "AT HER DESK". Sometimes they ask me to call a different number, but none receives those calls.
When I deposited the phone at the service center, it was under warranty period - but it is not anymore. Though they have confirmed that I would not have to pay for the repair since it was "deposited" in warranty period, I seriously doubt their honesty. I will be absolutely helpless if they charge me some huge amount.
I am a student and it is not possible for me to travel to the repair center every now and then. Needless to mention that I am depending on my friends' telephones. W300i took all my savings for years and it is impossible to buy a new phone. There is also possibility of having the same problem with a new phone anyway.
I really need help. If anyone have any advice, please e-mail me at my brother's ID [protected]@yahoo.com.