Shame Shame SONY–4 replacements and still a defective piece :(

This is regarding my phone Sony Xperia Sola which i had purchased on 6/6/2012 imei no. 352264051782338 which started giving network problem and hence i submitted my phone at sony service centre shadipur delhi on 17th july 2012. I was told that system wasnt working so i was given a acknowledgement slip on A4 size paper with the stamp of the centre and was told the phone will be swaped within 10-15 days.

After 10 days i called the customer care and i was shocked to know that according to there system my phone was submitted to them on 21 july (i had to suffer because of the callous behaviour of the service centre) . It is a shameful act as per the reputation of the brand SONY.

I did not got any call from the service centre at all regarding any information of my phone so i called the customer care again on 3rd august and i came to know that my phone was ready and that its been there for like 2-3 and they did not bother to call me. Not to forget i did not have any job sheet and the only thing which i had was a piece of A4 paper. When I asked them why i was not called they told me that my phone was not reachable which is hard to believe(refrence no 93421256 ). 

I got my phone on saturday i.e. 4 aug which was replaced with new imei no 3522644057097736, the phone was tampered as the black sticker above the motherboard area was not properly fitted. The phone again started given the same problem with additional problem of wifi not working.

Again i raised a complaint on 5th aug 2012 ref no 93424365 . i had now submitted my phone again on 7th aug to the service station and i was told the same thing that it will take 15 days to replace the phone and if i want my phone at earliest i should contact the customer care.

As suggested by them i called the customer care on 9 th august and i was denied a call transfer to the supervisor.  the ref no for this is 93451222 and the person who attended the call was dinesh and who was very rude and said its the policy and that nothing could be done and if you want to complaint regarding this i am free to do so .

This is not the end of the story as i got a red phone after replacement on 17/18 aug instead of a black phone with scratches on it which i refused to accept and then i had a conference call with Mr Danish repair head Delhi who through her associate mailed me that my phone will be replaced again with extended warranty till the time my phone was at service center.

i received my phone again on 25/08/2012 and it was shocking that this phone was still giving me the same problem and even after four replacements. plus additional problem persisted and hence on 28/08 i called them again and was shocked when i was on call with Assistant Manager who bluntly told that she can not do anything and that i will have to go to the service center aain. this callous behaviour and shamefull act that even after four replacements i am back to square one. 

does anyone know how this can be solved? any suggestions? thank you in advance.