Karbonn Mobiles — mobile warranty

I had purchased Karboon kc555 in bangalaore in September 2010. i am basically from Chennai and as my mobiles were not working i had to go in for KC 555 which had CDMA & GSM. i was told Karboon has wide network of service cent res and they are a big company which advertise in a big way in Cricket matches. There was problem right from beginning - outgoing sms were never getting saved- Many times when i try to search Name - it keeps saying the" Address book is being loaded" and it does not happen for a long time. Now it says the charger is BAD-- It has stopped getting charged - The charger given originally itself had problem in fitting into the plug socket i tried to talk to almost all those names listed in the manual as Karboon Service centres - All of them said they are no longer associated with Karboon - as the back up service was not up to the mark and also the volumes were not sufficient. my mobile is in warranty period - can someone suggest a good company authorized service centre in Chennai- Can the company come to my Service?