Contract cancelation

I have been trying to cancel my contract with vodacom since the 7th September 2020 and till this day it has not been canceled my problem has been constantly escalated but no response. I have an endless amount of references numbers and every time I've been told I will be contacted but nothing has been done. I have requested to speak to higher authority but no one can help or get back to me. Now I have to pay for a contact that I have canceled? Its amazing,ing how quickly I am contacted when it is time to upgrade but fail to assist when there is a query