Deduction for a cancelled contract 0662989985 - Consumer Complaint for Vodacom - Head Office

I had a contract for two numbers 0828561427 and 0662989985 and on the 23rd December 2020 was the last day of the contract. I refused to upgrade due to their bagged me promising to resolve the matter and I then upgraded only 082 number. The bill me for 066 number also though not upgraded and I called their call centre not once but they don't solve the problem. Please help before I block them from my bank please.