Telkom debits doubled the amounts

Towards the end of February 2026, I moved from 80 Gig, to a shared 120Gig that has 2 Sim cards. I was told about the service fee, all was fine. End of February telkom came up with a story that they bounced on my account and because of that they have charged me an extra R200+ amount. After argument with them, I let that slide. The next debit was gonna be end of March where because all is clear, they should debit just R270 for my 120G. Instead they debited R490+ I ran to their shop again where they showed me the error on their end and they confirmed that on my next payment they'll only take the few Rands outstanding. I took a screen shot of that from the sales lady. Now in April I receive my statement, still with an error, now reflecting that end of the month I'll be paying R380+, what on earth is going on really.