Terrible Accounts Department

I have a LTE account with Vodacom, which has expired in March 2023, I phoned every single month following up on when the service is expiring so that I can cancel it and NOBODY could give me a straight answer as to when it is expiring now I have an astronomical bill due to arrears accounts of which the biggest amount is the abovementioned LTE account. I am also being invoice for the month of May 2023 in which I could not use my service at all. This hardly seems fair to me and I would like assistance in this regards.