Billing for an additional contract

I took out a cellphone contract with a high end device Dec 2022 , the manager Wazier assisted us at the Telkom store TableBay Mall I received my bill and it shows I am being billed for an additional contract . He promised to sort it out, I had to call the store several times, I sent x2 e-mails to one of his agents. Wazier still didn’t get back to me. This is poor after sale service. I spoke to him on the phone when I called the store in January, he promised to cancel the additional contract and load my credits, but up until today , no case number that gives me proof that it was sorted. When I spoke to one of agents a few days ago she confirmed that still nothing was done on the system . My debit order is 31st January and I do not think it’s fair that I have to pay for an additional contact , just because the store manager don’t do his job properly . I have been a telkom client for years and have never experienced this type of client service