Reliance Communications — mobile network problem

sir, I triloki rajput is reliance cdma user in PALAM delhi area. my mob No is [protected] (prepaid). I am suffering from very poor network connectivity since last four days.First, call is not getting connected and if it get connected then it is getting disconnects automatically very soon in between of call with notification " Can not complete the call please try later". When i call to customer care, he simply made excuse that your Mobile Handset is faulty please get check your handset Whereas my Handset is fully OK and Serviceable. With this problem i am very much affected as i am not able to make call to even my relatives and so many important work is pending due to this. So please look into the matter.