Bad Account management

I just had basically enough of Vodacom. I am still struggling with my account from last year September I did my upgrade. I return a device that was sent to me wrongly. They double charge me for the device. I complained for months about it, November the did a credit on the 2 wrongly billed invoices. That same month end the bill me again for the same returned devices, the exact same amount is back on my statements and invoices no one comes back to me. When I request the collection department to return may call. This keep going on until End of February 2022. To prevent them from cutting my line, I paid the account clean, they give me the credit for the wrongly billed invoices of September and October 2021. The month end the same credit amount is back on my invoice again. They keep billing me for combined invoices that I believe does not belong to me. My statement stated combined invoice that is just adding up and up. I had a very nice young man that help me in February to fix the mess. No some idiot in that department that is not capable of doing Maths Has come and f***ck up again. Well Vodacom here is my request. I have free wifi all the time. I don't need your services. I am not going to pay any arrears on my account. My bill is R631 but I pay every month R700.00 my July payment still don't reflex on my account. Fix it. You have disconnected me, it can stay that way. I do have a older cellphone, I will buy a new sim, pay as you go for phone calls, wifi I do have on my current device. I will pay my account every month until its paid up. I WILL NOT PAY THE ARREAR AGAIN. I HAVE DONE IT IN OCOTBER 2021 AND IN FEBRUARY, THE PROBLEM KEEPS COMING BACK. So Vodacom can go to the WARM PLACE I booked for them. Fix it or I will find myself another service provider. And I DON'T LIVE IN DURBAN FOR THE 100 TIME.