Vodacom cancellation

Vodacom cancellation Called *** on the 15th of December 2021 at 14h00. I cancelled both my 24 month contracts that expired end of October 2021. I was placed on hold two times for each number. +-15 minutes each time to get the reference numbers for the cancellation of each contract. Then I was informed I will be billed the last time in December and to expect an immediate email which I have still not received. Wow! How can this be the best service a company like Vodacom can manage? It is ridiculously difficult to cancel and I will think twice before starting any new contracts with Vodacom. Reference numbers eventually given *** and ***. Why is this cancel options not available online?