Contract Payment Issue.

I would like to state that my interaction with Telkom has been absolutely disgusting... I got an sms stating that I my account had no funds to debit R529 contract amount... The sms I got was as follows " Dear Telkom Mobile Customer. Your total balance for account number *** is R1269.53. R740.53 is current and R529.00 is in arrears and payable immediately, you can visit https://apps.telkom.co.za/alpha/public/register for immediate payment of your arrears. Please ignore if already paid." I then paid the R750 and I got an sms notification as proof. My account was handed over because of 1 missed payment and no one called to inform up until I sent an Email. Now what I don't understand is how 1 missed installment can amount to R1269. We are now in October, the 20th my account was not debited again, up until today. I have tried to contact Telkom via the App, no results, I tried calling Customer Care numbers 10210, 10120, 100. The voice prompt will request info then send an sms referring me to Telkom's WhatsApp chanel, which seems to be not helping at all as my query is not an option on their menu. I'm so frustrated as I'm not getting any assistance or calls and I've logged 3times today to be called back. This has been an ongoing issue which I have no resolution to. I'm just trying to pay my account, I don't want this to affect my credit score. I don't understand why we can't just have a number to call and get proper assistance, not individuals at Telkom telling me that "it's not my department" such poor service, and I myself work for a Bank in servicing department and I can guarantee that we take care of our clients. I'm really disappointed