MTS / Sistema Shyam TeleServices [SSTL] — data card no [protected]

Address:

New Delhi, Delhi, 110063

I want to deactivate my data card because there is no network no speed and they put there bill from last two months how many times i complaint in company there is no action so that now am not clear your bill firstly youe wave off my bill and resolve my problem then i can pay for that but for those i can use...
Company said you can use 20gb data but now they can say 10 day 10gb in night
Fraud commitments they only know how to make customers fools