Vodacom theft of loyal clients money!

I have been a client for over 30 years with multiple accounts. I have recently been advised that an unused sim for data was updated a year ago with a year to go costing me R200 pm. This was apparently done by a call centre. I have no recollection!!!? The data sim has never been used and still I pay R200 pm. I was told it cannot be cancelled and they can’t give me the recording that upgraded it for 24 months. This a sim that is not in use and not in my possession!!!! I expect Vodacom to reimburse me the monthly amounts paid and cancel the contract! Failing this I will cancel my 30 yr relationship and move and advise my center of influence to do the same!! This is blatant theft! I have been into 3 Vodacom centers to resolve and called client services many times with no success!! I’m over it!!