Airtel — problem of sudden call drop and problem in incoming and outgoing call

Address:

Panipat, Haryana, 132140

Calls are neither going nor coming. Only text message and internet is working. When someone is calling it's always showing unreachable. And when i'm trying to call it's going after many attempts of call. And when call is going on it drops suddenly without any reason. Can you please fix it otherwise i have to change my sim card. Due to this problem i cant totally depend on this airtel number i have to use other number for urgent calls. Please solve that problem as soon as possible... Either i have to switch to other service provider