Telkom increasing my contract money without my permission

I had a contract with Telkom since 2017 I never had problems all of a sudden they make extra charge on my account from August 2024 they increase my contract from R270 to R389… I called them on the 2nd September to ask them what’s happening they said its subscriptions on my account I asked how they said it’s a technical problem they will fix it and she’s escalating my matter, I wanted to know what’s the turnaround time she said she can’t say what’s the turnaround time….. again I received an invoice for the following month that says R618, I went to the store to ask them what’s happening they said they don’t see any subscriptions on my account but we must call Telkom billing department to find out I called them they told me that it’s a technical issue again and they have cancelled it so month end I’ll pay R270 not R618…. Come month end they took R618 I disputed the debit order on my app… they made I debit check on the 2 October 2024 I called them to pay back my money they are saying they have escalated the matter again and they don’t have a turnaround time I must just wait so I’ve been waiting for them for over a month now still there’s no turnaround time 😭😭😭😭 today I received another invoice that says R922 that time I’m only receiving 120GB😭😭😭 I’ll call them tomorrow morning but still I know they’ll tell me they don’t have a turnaround time what they can do is to escalate the matter…. I can’t anymore this is too much