Top up instruction for deleted number

FNB as a bank is brilliant, but I cannot say the same about FNB connect. A top up amount for R109 is coming off my account for a number that is no longer active. I have tried numerous times to get this rectified but the call centre agents are clueless. I once spent over an hour sent from one department to another with no luck. My private banker was tasked to resolve the issue but I haven't heard anything back.

It cannot be that difficult to resolve, I just need someone to remove the top up instruction against this number.