Disgusted with Vodacom service

Vodacom process and systems are totally useless to customers. My contract ended on 2 December 2020, I've been calling since November to get my contact canceled. Each time I'm told they are escalating it.. I don't know where to, because no-one does anything. Spoke to Angel, Sapele, Nomfundo, Nagabulo. Every month they send me a statement and debit my account. Someone will call me within 24-48 hours... Still waiting. Unacceptable and disgusting service. They also mess up the account every month, don't deduct the promo, then I have to go in and pay the correct amount in cash.... Really???????