WiFi is not working

I am using Airtel wifi connection in my homeroom last month I am facing a issue not working properly, when I mention my complaint in Airtel they told me it will be resolve within in a week but not resolve again I called in customer care regarding my complaint then they told there is no your complaint I will mention my complaint again within in a week it will be resolved. but no result, then I called one person whose handling my area problem name is Mr. Brijesh he told me there is no issue we can’t do anything, all are ok from our side.

now what should I do please support, I am paying 1300/- every month but can’t use a service.