Please deliver on what was promised

I took out a internet contract, on my contract i selected my debit date to be the 20th of every month. When i received my first invoice i see the debit date was for the 29th. I immediately reported this to Telkom on the 21st, as i had the money in my account and i was prepared to pay the invoice via eft however i was then informed that they will still deduct the money if i do a eft payment. A call was "logged" by Primrose to have this resolved - i am still waiting for feedback. is this your commitment to service? who is doing QA to ensure such mistakes don't happen or who is ensuring that client's queries get resolved - Come the 29th when i don't have money - who will then liable to pay this invoice?