VODACOM CONTRACT FINISHED BUT STI DEBITING

I have been using Vodacom for almost my whole entire life, I then ported to MTN due to rates, therefore I am deeply disappointed by the way things have e been handled as far as the contract I took with them. I took a cellphone contract in November 2020 and this was a 24 month contract. They have continued to bill my account even when the 24 months has elapsed. I have tried calling but the cancelation number keeps telling me to enter my number or press # but it keeps repeating this without any solution. J have even gone to their shops but they say they can't help me because I must call. I once took a loan with Capitec and when I paid my last installment they had the dignity to send a text stating that this was my final month of the loan repayment. ? Is why can't Vodacom be professional like that and do likewise. The only thing they know is to send me a statement saying my account is in arrears. My account is not in arrears I reversed my Jan debit order because the contract is finished. I am really disappointed period