Poor service delivery

I have had such poor service in cancelling my data and cellphone contracts, which expired in December 2020. How difficult can it be Vodacom? I phoned in yesterday, because I received an elevated invoice amount on the contracts that ended. Apon enquiry, I found that the contracts were not cancelled as per my telephonic request in December. I phoned again yesterday, received only an confirmation that the data contract was cancelled yesterday. I phoned today to hear that my cell phone contract was not cancelled as requested! How long does it take to cancel an expired contract at Vodacom? Do you just receive payment accounts month after month? It's like a nightmare that doesn't end! Im appalled!