MTN deducting the insurance on the customer even when the customer did not agree on it.

I went to MTN Mall of Africa to upgrade my contract in May 2024. The consultant Mr B Ndlovu upgraded my contract, and I asked him not to include insurance on my handset as I will insure it with my household insurance. Last month on 06 October 2024 I went back to the store to inform him I was still being debited for insurance on my contact. He apologised and asked me for my OTP and said he will cancel it immediately. He informed me that the store will reimburse me monthly using cashsend from his account! How can a big company like MTN reimburse my money using cashsend? I left the store knowing the insurance has been cancelled. However, on the 01 November 2024 my account was debited again with the insurance amount. I returned to the store on 10 |October 2024 and the Manager there informed me that Mr Ndlovu is on leave. I called him again on Monday 11 November 2024 so many times and none of my calls were taken. And on the12th of November 2024 I called him again and he answers stating he is on his way home and I must remind him the next day to cancel the insurance. I have been calling him and since then and every day, but he is not taking my calls nor replying to my WhatsApp messages. I am so frustrated with the service at this store.