Incompetence

I have two sim contracts with telkom, each sim cost R69.00 per month. In july I had a problem with my bank, and I paid via EFT from my other bank. Second week of September, I went to the branch and asked them to change banking details, I was surprised that they didn't debit and I paid again via EFT. I then received an sms wjth R406.29 arrears, I called customer service to inquire and was told that's what I owed. I asked about the changing of bank and there was nothing from their side, asked who's at fault, the consultant or I. A week later I got another sms with R538.50 , today it's R672.47and threatened with credit bureau. I posted about this on X and Maggie contacted me via dm, I asked Maggie to call me but till today she/he or AI Karabo has never, when I asked about supporting documents Maggie stopped texting and the only thing I got was messages about credit bureau. Telkom is very incompetence