Vodacom -They don't cancel contracts, just suck you dry

I ended a contract (which was A phone for my son) in May 2023. Since then they kept on deducting subscription from me. Every time I phone they have no evidence that I called and cancelled the contract (which officially ended end of May). I reversed the last payment and now they claim the arrears on the account. I phoned again last week and now can only end the contract once I pay the arrears????? If you phone client care, they put you through to cancelations??? NICE WAY OF VODACOM TO MAKE A BUCK OR 2 MORE OUT OF A CLIENT, THEY JUST DONT CANCEL A CONTRACT, THEY JUST KEEP IT GOING UNTIL YOU IN ARREARS AND FORCE YOU TO PAY BEFORE YOU CAN END THE CONTRACT, PATHETIC!!!!!