Cancelling expired 3 contracts at vodacom since Jan 21 and vidacom bluntly refuse

Since January 2021 I have been trying to cancell 3 contracts at vodacom, the 2 year contract expired and after several phone calls from myself to vodacom, it has still not be done, this is highly frustrating as I have explained several times, that the phones and contract expired, I don't want to renew it as I can no longer afford it, and still vodacom keeps deducting the money's and refusing to cancell these contracts by bluntly ignoring what I tell them, I am in desperate need for vodacom to stop the 3 contracts as instructed several times via phone calls, this is terrible customer service by forcing me to stay with contracts that are no more in use