Airtel — calls not receiving

Address:

Chennai, Tamil Nadu, 600061

For past 3 months if someone calls me it says as out of coverage. 90%of the people who calls me told this no matter wherever I am. I have full tower as well. Also I have recharged 399 pack and there is no internet connectivity at all. 4G is like 2G speed only and not losing at all. Waste of money and only I use 100MB per day due to this. Poor customer service and have decided to port out and switch to another network