Vodacom is trying to ****m me

I have a vodacom contract that has been running since 2018 , I had another topup contract 2022 July. So my monthly debit is supposed to be 448 on the 20th of each month . In November I took airtime advance of 64 rand and forgot to pay it back , then my debit was 534 . I called vodacom and I was told I didnt pay the airtime advance, I accepted that . Beginning of the month of December I took another advance of 33rand , paid it back on the 20th with my airtime I bought from the App . Yesterday day Vodacom debits me 551.00 I call to find out why i am told i took airtime advance of 74 rand , I'm no i did not , i am told the system states otherwise. I checked my statement and it says " balance brought forward is 534" How WHEN I HAVE ALREDY PAID YOU GUYS. I want my money back otherwise I'm Canceling both my contracts . I logged a case the Reference is ***