Breach of Contract Agreement

I have renewed my three contracts at Telkom and the billing has not been right since October last year. Continuously calling and trying to resolve doesn't seem to help as this is not corrected. First Contract is R269.00 and I am being billed R399. Second contract is R299 and I am being billed R474. Ridiculous how Telkom can get away with inflating debit orders without a client's consent ! Will be taking this to Ombuds if not resolved timeously and I am refunded for these past months.