To cancel Vodacom contract is a nightmare

Cancellation of all my accounts at Vodacom I have cancelled all my accounts at Vodacom on the 5th March. I knew one number was still running until July 2025. Or that is what the person said to me that I spoke to. I have asked for it to go prepaid. I paid this via a Debit Order. I am 79 years old and don't go into my emails anymore. My contract is still not cancelled, and I am still getting billed for things I did not ask for. My account is still not just prepaid. I phoned again on the 9th October. Spoke to Lela Nkosi. She confirmed that I have cancelled all my accounts and for *** to go prepaid. I only use WIFI. Nothing happened. Today I spoke to Sinalo Sngwenya *** and she said she could not assist me because my account is in arrears. After trying to dial *** a few times, I spoke to Leba Duze and she tried to help me until the phone went down in my ear. When I tried to phone again, it was out of office hours.

Apparently I can't cancel this account and cannot do anything until my account is paid, but the account should have been cancelled and changed to prepaid.