Airtel — very slow 4g network

Address:

Ahmedabad, Gujarat, 382481

I am from Ahmedabad & using Airtel postpaid connection. But 4G internet speed is dead slow. Due to that i am forced to use another network. Also, i have checked the net Speedtest 0n OOkla, but its really very poor. I made a complaint 4-5 month back as well. But no activity happened for resolving this issue. I am attaching the image of Speedtest as well.