Telkom - Debiting more than they should

Telkom - stop debiting my account with R352.19!!!!!!! My cellphone contract expired in April, thus my device fee falls away as from May. The only amount applicable is R109.99. Its costing me money every time I have to reverse the debit order. Wake the f@ck up and stop *****ing from me. This is the second time youre trying to ***** from me! Had the same issue with my internet contract. Invoice number - A***.