Need Help to Cancel My data cards. STOP BILLING ME

Good Day, I have been struggling to get my Telkom data cards cancelled for the past 4 months, since June 2015. I had 2, contracts for 20 gig data cards, the contract have past the 2 year period and I want to have the cards cancelled now. I went into 3 different telkom shops over the past few months, Southgate, Clearwater mall and Lenasia in Johannesburg, each made me fill out cancellations forms, each month even though i filled out the forms at the other stores the months before, but still every month after that my bank account is being debited for this service. I no longer live in South Africa now and have not been able to use the cards hence i need them cancelled! I have called the center as well earlier this month, they confirmed that my cards were cancelled and that i will no longer be debited this month, but today i see that my account is still being debited for these. I have never had a problem with Telkom during my contract period, but now that i need to have these terminated it is the worst service from Telkom ever. PLEASE CAN SOMEONE FROM TELKOM HELP ME TO HAVE THIS RESOLVED AND STOP DEBITING MY ACCOUNT!<br> <br> Thank you,<br> Miss T.L.Scholtz <br>