Failed debit order fees

Telkom is the worst, 1st I took LTE contract with them and on my application form I chose the debit order date to be last day of the month. They decided to debit my account on their own date and when the debit order bounced they charged me for a failed debit order and again in January this year they did the same thing. I called Telkom billing and they said I should go and get a specific person that submitted my application at the store to resolve my issue. I went to the shop and the consultant also said I should call Billing team afyer wasting my petrol driving to Melrose Arch. I ended up paying everything to avoid being blacklisted and messing up my credit scare.