Disgusted in Telkom

Our contract expired and we chose not to renew. This happened a FEW months ago...We advised them we will not be renewing, I especially went to the store as their services telephonically is ****!They assisted me and I received a reference to confirm, the non renewal and was told it could take up to 2 months to come into effect...Which I do not understand, because normally it takes up to 20 business day. Nevertheless... they deactivated our sim, but they are still debiting our bank account. They are taking money from our account when there is no longer a contract in place. I would really appreciate it, if someone at Telkom can take charge of this matter, as NO ONE could assist me telephonically. I will never ever take out a contract with Telkom ever again!!!