Cancelled - Confirmed cancelled - Not cancelled! All from Vodacom employees

So on the 21st December I called and cancelled my contract. On the 20th January 2021 someone from Vodacom called wanting to offer me an upgrade. I told them that I had cancelled my contract. She checked her records and came back to me to confirm that the cancellation had been processed. In February I am still getting invoices. I just took a call now (after 8pm) from a Vodacom consultant who is adamant that there is no cancellation and is advising me to call the same department that I spoke with in December!

Vodacom get your act together. In the meantime I am getting billed for something I last used on the 19th January 2021!!!!!