Bad service

I app**** for a vodacom sim-only contract and it was approved but before they processed everything I asked the consultant who was helping me to change my existing vodacom number which is a prepaid to a contract and she told me it doesn't allow but she said I can go fix it in the store. The simcard was delivered on the 4th of January 2023 on the 5th I went to the store where I was told that it is not possible to change my prepaid number into a contract because the new number is already active. I then said to the consultant who was helping me to cancel my contract because I don't want to have 2 vodacom lines, I wanted to keep my existing number. The consultant who was helping me then said I need to call vodacom myself which I did but till today I haven't received any email to say that my contract with vodacom has been canceled. I'm really not happy about this experience, at the end of the month vodacom will deduct money for the contract I said I'm not interested to keep it