Vodacom

After multiple calls to vodacom from October 2020 to cancel two contracts that I had on my account. I was billed at the end of November, in the beginning of Dec again I phoned and found out that my contracts was not cancelled as I asked, I then asked the operator to cancel it for me again and the only one was cancelled but then at the end of Dec I was billed for both contracts that I asked to be cancelled. So I decided I will hold back my money for them not to take the money for the contracts, now I am getting calls to pay my account but they can't give service. I spoke to them this morning 11 Jan 2021 again for them to solve their problem