Sony Mobile — Warranty (Xperia L)

I bought Sony Xperia-L C2104 White IMEI-[protected] on 21st July 2014. Within one week it started showing an error while opening the camera saying ‘Camera not available’ I took it to sony care centre in Mandi district of Himachal Pradesh and they kept my phone for about two weeks and said its motherboard needs to be replaced. When they returned my phone they almost destroyed the back sticker and pasted it like phone was kept under the box filled with rats but I ignored it because it was non visible part of the phone. But later and till now I am having some logical issues with speackers like when I turn the music player on the volume comes from ear speackers. I later took phone to SANKALP ELECTRONICS, PATIALA about three or four times but every time they keep my phone for about whole day and at the end of day they returned it with its firmware reinstalled and they says its nothing but a minor software issue. Second time when I took my phone to them they again reinstalled its OS and returned within an hour saying there is no problemin the mobile all issue is with the memory card you are using.I almost laughed at their (that) non-sense theory. I am a certified electromechanical design software professional and I know very well what a VIRUS is and how can they make fool of me saying that this so called speacker problem is because of VIRUS in my memory card.I just want to know why they dont even see what the problem is why every time they reinstall the software and returned the phone. Today after attending a call the display of phone turned off.I was able to receive call but could not attend because the screen was off...I took it to (SANKALP ELECTRONICS, PATIALA). and they opened the phone and reinserted the battery and said its because of the applications you use are third party and said they need proof to state that this problem is very often. And he was unable to answer when I asked for a list of authorized applications and said even whatsapp is not authorized.[protected]i want to say if whatsapp is not authorized then { try to print on every phone you produce a label saying **WE DO NOT OFFER WARRANTY IF YOU USE WHATSAPP ON SONY MOBILE** and see the change in your customers} Now when I thought about a new phone I came to know that even under warranty current market price of my phone is 4000INR..It seems like I've actually lost my 14000 RUPEES by buying this product when your authorized care centre can't provide me solution of my problem. I KNOW WHEN MY PHONE’LL GET PROBLEM IN FUTURE THEY ARE DEFINATELY GONNA DETECT PROBLEM IN IT BECAUSE AT THAT TIME MY PHONE WILL NO LONGER IN WARRANTY AND THEY WILL CHARGE TOO MUCH. they talk too big when it comes to sales now their technicians cant even tell me how the problem will be fixed. Please do the needful. Parwinder Singh [protected]@gmail.com