Telkom’s **** service

I have a Telkom contract for R99 taken up in November 2017, debut order to go off on the 20th of every month. However telkom does not debit me every month they debit when they feel like, I’ve called in serval times to ask them to debit on that particular day. So I recently app**** for vehicle finance and my application was declined because I am a slow payer and have missed payment of R99?. I went to Cornubia mall branch and they said I don’t owe anything!! I should call billing called billing they say my account was debited on the 4th! Okay !! I tell the consultant I need a letter that states I don’t owe telkom so I can give it to the vehicle finance company they said letter would be ready in 7 days???? 7 days???!!! My credit score, my application and so many other things I needed to get done are stand still now all because telkom failed to debit on agreed date, there is money on the account and on top of that I have to wait 7 days to get a letter stating I don’t owe them!! Such bad service, an inconvenience to me and my family and worse of all I am listed as a slow payer just for R99. My colleagues and friends have experienced the same thing and have opted to pay via EFT. What’s so difficult about debuting an account???? Really!!