Over charged and wrong date debit order

Telkom does not deserve a star. I logged an incedent over a week ago. Still no response. Not only do you debit my account 12 days late. But then you debit 300 extra. For what? That was not part of the agreement that I signed for. If you think you going to tell me that I'm being charged a pro rata for late debit order because you failed to debit on time think again. I got all documents and evidence that would clearly show that you in breach of contract. You are a clear example of a 30% Matric pass rate