[Resolved]  Karbonn Mobiles — mobile switches off often

I bought karbonnk20* mobile on 27th august 2014. after a month it gets switched off often and skins in the number keys are coming out. i contacted the service centre and said the problem that it gets switched off often, they said that it is due to battery problem. so they asked me that xerox of bill. i gave it on 28th november 2014.they promised to give a new battery within 25 days . But till now i didnt receive the battery and they say, they have not received the battery from company . now todays date is 9th January 2015. i am not using that mobile for the past 1month due to the problem. I hate this type of service. Want to replace a battery or problem. If possible I need a new mobile set or a compensation amount for this problem.