Telkom cell contract

In Dec 2021 I got paid early and made an EFT payment of R350 my monthly installment on the 24th Dec, I tried calling several times to inform them about my early payment and to move my Debi check to Jan 2022.but I did not get hold of them. The phone would ring over 6 to 8 minutes without speaking to anyone.

Now my account is not in arrears at all. On the 31st Jan 2022 the Debi check went of for R1050. 70 and not R350, I have called them on the 1st of Feb 2022 and was told the money was deducted from collection. I asked for the number to find out how they got to such amount and why my account is with collections. The lady is spoke in collection could not find me on their system and referred me back to telkom. I called them again on the 2nd and 3rd and was told to wait for 7 to 14 days and call back for a refund