Refund expected!!!

Vodacom, I have tried to call on the call centre on numerous occassions. No one seems to care or direct my query correctly. In September 2018, i returned a product within the 7 days as I no longer wanted it. You continue yo charge me for services for a device I no longer have. Previously I have requested you remove these services, it has not been done. I now require that you terminate these services and provide a full refund for these services I have never used. I have honestly have had enough now of this thieving behaviour!!!