Hathway Hd — outstanding amount to be paid

Address:

Hyderabad, Andhra Pradesh, 500072

Hi... Was using hathway connection in 2015 and not satisfied with service, frequently there used to be disconnections and the service used be down for more than 2 to 3 days without any update from service provide even though after raising complaint customer care... After many complaints i disconnected the service in 12/28/15. I have sent mail and got reply from service provider that they will disconnect the service and collect the modem (I have mail proofs). After that i thought they will disconnect the service and not bothered about it but the are regularly sending bill to my mail id every month for bill payment which i haven't used... Now i am receiving some prank calls from delhi saying they have putt up case against me... Please help what i have to do.. Recently once again i called hathway and explained them everything still they didnt take any action and closed my request without any information... How would i take this forward.