Airtel — internet slowness

Address:

Sector E gali no. 8, Paani ki tanki wali gali near YSS mobile shop, Indore, Madhya Pradesh, 452015

I have submitted so many complaints regarding the slowness / internet not working complaints but I have not yet received any proper update on ticket even not resolved slowness issue.

Each and every time the symbol of internet shows E and G symbol. Whenever it's come to 4G it's show with ! Marks.
Whatever symbol shows in mobile but internet doesn't work.
Is there any solution for it ? I did changed the sim slots alternatively but issue still persists.

I usually recharge with more than 500 rupees for 81 to 84 day net use but I loss without using net due to slowness around 2 gb per day. Could you please help to resolve such issue without closing ticket with proper update.