Payment allocation

Horrible and exhausting experience. I have been trying to resolve an issue from last year November till date i am still up and down trying to resolve this. I made a manual payment for my contract last year 05/11/2024 of R1180 at Vodacom Bridge city kwamashu only to get call that i am behind with payment. I went to the store to get clarification but all i got was being sent up and down back and forth, I eventually ended up getting assisted by the store manager who advise me to go to my bank and do a transaction dispute of which i did exactly that only to find out that the merchant rejected the dispute. Fast forward today payment has still not been allocated to my account and leaving my account in arrears/ behind. I am honestly failing to understand why it has not been resolved it almost a year now and this is affect my credit.