Telkom contract cancellation

on the 16 April i received the modem and i experienced problems with network coverage and called telkom on the 23 April to cancel the contract. on the 26 April they called me to arrange to come and collect the modem. i even went to the store at kempton park and they confirmed that i do not have network coverage and the consultant who processed the contract for me was suppose to tell me. however telkom start debiting from my account in June and i called to ask why they are debiting since i have cancelled the contract and the Simphiwe Nxumalo to me that i shows on the system that it was not cancelled and will log a a case and solve it. They are still debiting from my account and i do not know what to do anymore because i have been calling them with no help all consultants promise to retrieve my calls on that day and investigate further.