Vodacom keep debiting my account and won't reimburse me.

I downgraded my Vodacom service from SMART XS+ to uChoose Flexi 65. Hopefully saving myself over R540 per month. I signed all the forms "verbally" and received my confirmation. I was informed that the new billing cycle would start on the 1 September 2020. However I received a bill for R581.02 for August.

I complained on FB and hellopeter and Vodacom told me that they had changed my contract to UChoose Flexi 65 and I would therefore be paying R65 per month and they would credit me the R500. They credited me just over R100.

On the 30 September they billed me for R477.03, even though I have a Uchoose Flexi and my bill should be R65 per month.

I honestly dont know what to do anymore, except close my Bank account so I cannot lose anymore cash.

I have now emailed Vodacom to cancel my account and hopefully they will stop "debiting" my account and we can put this debacle to bed.