Airtel — continuous call drop and very slag data transmission

I am old airtel user i am having 5 airtel connections, my experience with airtel was good but from last two months there i experiencing continuous call drop even the doesn’t connect and in last two weeks almost every call is dropped.
Regarding innternet it is very very slow it shows 4g, 3g but the data is mot transmitted i have wait for minutes to download or send short video.
I have complained the issue but nothing is done so far and i am facing the even now.
Please resolve the issue at earliest. I will wait for two-three days and if the issue not resolved to my satisfaction i will complain the issue to trai.

With regards
Chandramani khandare