Airtel — internet speed is very low

Address:

Bokaro, Jharkhand, 827009

The internet speed is very low during the day time. Sometimes I can not even open a Google page. At night, during 12 am to 5-6 am, it works fine. The tower (network strength) of 3G & 4G always remains between 1 to 3 whereas the 2G network is full. Please do something asap as I've bought the 399 plan which is valid for 3 months. If the internet speed doesn't gets better, my money will be wasted.

Thank You