Terrible service from Vodavom

I was retrenched in May 2024. I have two contracts for my grandkids with Vodacom. Due to by retrenchment I cannot afford my contract with Vodacom anymore. I did not renew my two contracts and cancelled it in store at Oakfields Vodacom. The staff phoned Head Office to cancel the contract, but someone in Vodacom did renew my contract. I phoned numerous times and email customer services and cancellation to cancel the contract, but nobody is responding to my correspondence or my telephonic request to cancel the contract. Everytime I get told that the two contracts is cancelled, but I received yet again another invoice that I must pay for the contract.