HTC — complaint

Hai I am Gokul Krishna from Cochin Kerala. I took a HTC mobile on[protected].It is a HTC 816g model phone. The phone got complaint the very next month, that was on december. It was a connector problem. The phone was not getting charged. I am informed from the HTC service centre Cochin that it will take one day to repair it. But i had a very bad experience as it took around one week to get it repaired. They did not even inform me when the format the phone and i lost all my contacts and important bank messages as i am business man it was al very crucial datas for me. I used an old phone for one week which i left behind due to some problems. I went to the service centre three times to get the phone. BUT NOW THE PHONE IS SHOWING SOME PROBLEM AGAIN. The SIM card is coming out of the slot and it is showing no sim card detected. It is pushing out automatically from slot. I am a business man and i have many calls and messages coming. But now it is a very very bad experience with the phone and i am undergoing a very bad pressure. Now i need to find a phone again for my use. Complaints could happen obviously as it is an electronic equipment. Unfortunately i got the unfortunate gadget. I cant go forward again with the same handset. It is not worth my money and the pressure and tension which i am going through. I would like to get my set replaced or want to sell my phone as soon as possible. I am looking for a positive response from your side or i will try my luck in some other means like consumer court or something like that. I have no other go. Please take necessary action. I am planning to approach the service centre tomorrow. Please do the needful.