WORST SERVICE IVE EVER RECEIVED THANKS TO VODACOM

I am HIGHLY DISAPPOINTED!!! I've been a customer of Vodacom for 20 years and I've never received this poor service from anyone. Long story short: Last year I moved from MP to the WC and therefore canceled my fiber account with Vodacom, but I still kept my cellphone contract with Vodacom. Last year Nov 2020 I submitted my cancelation letter with regards to my fiber account. Vodacom kept on billing me for over a year after my cancelation eventhough I've spent hours on the phone with multiple consultants to sort it out during these 13 months. Its been phone call after phone call, email after email, Vodacom promises me every time they will phone me back NEVER ONCE DID THEY PUT IN THE EFFORT TO DO SO!!!!!!! 3 Consultants confirmed that my cancelation shows on the system but has not been processed... I CAN NOT DO THIS ANYMORE!!!!! They billed me R750 from November last year up to now, it adds up to R10 000 plus. It's insane.... a year of begging them to sort it out and a year of billing me for something that I canceled. This is UNACCEPTABLE!! Last week they said they will stop the billing and surprise surprise this morning they deducted R1900 from my account! I don't know what to do or who to talk to anymore, I am angry, frustrated and desperate! Can you please assist??????