Completely Unprofessional

Went into the branch to enquire about paying off the rest of my device and switching from Free me 3G to infinite top up - monthly debit order of R1300 went off as usual on 06 August 2022 - The total for the device is R15 250 that I signed a debit order to go off on the 1st September 2022 - Now my account has been suspended because I have reached my credit limit ..... I called Telkom and the guy I spoke to could not explain to me why I was suspended when my account is paid, it is just the R15 250 that is due on the 01 September 2022 - he kept telling me that my credit limit had been reached - when I questioned him further, he asked me if I am understanding what a credit limit is and the people in the background started laughing --- this is totally unprofessional!!! The credit limit should not be reached as it is only suppose to charge my account on the 1 September 2022 for paying my device off, not my data!!!!!! I HAVE PAID FOR MY DATA THAT EXPIRES ON 31 AUGUST 2022 BUT CANT USE IT!!!!!! - You will not get a cent from me until someone calls me back and sorts this out ASAP!!!!