Cancellation of Wifi contract - Pathetic service

I have been trying to cancel my Telkom Wifi contract as it was to expire and i had no need for it any longer. I did eventually get through to the call center and was emailed a cancellation form which i completed and emailed back. Since then, i have emailed that form 3 times and i am still being debited and the contract has not been cancelled. Please contact me immediately to cancel my contract and refund me for funds that have been debited from my account.