Cancelled Contracts - Continued being billed

I have cancelled my Fibre and Mobile contracts with Telkom since FEB '20 yet they continue to bill me... even have debt collectors after me since I eventually actions stop-orders with my bank.

I have called them, mailed them, used their portals, bots and tried their stores with no solution coming... If anything each time I reach out over the last months they cannot even find record of my communication.

Telkom, you have ****** thousands from me; I have no idea what I am expected to do to have you refund me and to get out of my life.