Airtel — regarding 4g @ 3g network issue

Address:	East Khasi Hills, Meghalaya, 793007
Website:	no website network 3g & 4g problem

I am using airtel prepaid for the last 3 years back and my sim too upgraded from 3g to 4g with hopefully so that i can get network speed. Since from one week 3g network is full strength but very poor when using internet. I am unable to open even google search. This make me disappointed.. Request you to look into the matter urgently. I used to call the customer care service but in vain. Moreover airtel give unlimited pack but cannot avail fully due to above stated. Setting also done in auto mode 4g, 3g, 2g but in 3g network it is not working.