Airtel — Upload speed issue in Airtel broadband

I have taken airtel fiber 799 plan which is 100 mbps and i had taken for 3 months advanced rental but after 1 month i had taken static ip and it was given to me after 1 month and after that by upload speed became only 10 mbps instead of 100 . since then i have been calling customer care but they never bother to resolve it . everytime i call customer care they raise a complain and close it from the backend team without my permision . i had raised one more complaint, the ticket id = '[protected]' raised on 30 may . today is 30 jun still not resolved . no one calls me no one comes ...

please look into this matter ...