Contract cancelled months ago - Still Debiting Acc

My wife had a contract with Telkom mobile. At the end of the agreed contract period she completed the relevant Contract Cancellation form at Cresta (July 2015.) Since then they continued to debit her account each month for a few months. She has visited the customer centre in Cresta three times since then and each time is given another reference number and assured that it is their mistake but the problem is now fixed. She has even spoken with the manager (Billy.) Each time she goes there they phone her afterwards to confirm that she wishes to cancel the service which she duly confirms with them (last spoke to Kelebogile - ref ***4 ). Still the debit orders happened. Eventually she cancelled the debit order at the bank. A month or two went by and Telkom reinstated it. She cancelled it again. Now she is receiving sms's stating that she is in breach of contract due to unpaid debit orders! Telkom - what you are doing amounts to theft. It must stop. The contract is over. <br> <br> (Some other references along the way - Person : Akona ref ***7, ***1)<br> <br> You owe my wife R1762.74! Your agents informed her it would be refunded. PAY BACK THE MONEY NOW AND STOP WITH THE HARASSMENT!!