Useless service from VVM

I have decided to payoff my Vodacom contracts in January. They emailed me the Early Cancelation contracts. I paid off all my contracts and mailed proof of payment to Vodacom. In February Yvonne from VVM phoned me and said there is still an amount outstanding. So I paid that amount and she asured me that my account is now settled in full and closed. May 2025 i got another call stating that I still owe an amount and that they going to hand me over. I paid that amount also and email all the proof of payments to Yvonne. Se rep**** and said that my account was paid up and the last payment was not necessary due to giving me discount. Yvonne told me she will arrange a refund. After weeks she is ignoring my emails and calls, I spoke with a Neo at VVM and he told that they cannot help me because I must deal with vodacom myself. I think this is really pathetic as they are the one who called me for outstanding amounts, and I paid up all my accounts!!!! Their service and client care is useless!!!!