Cell C Fibre - Customers don't matter!

My account (fibre) has always been up to date with Cell debiting me monthly - the change in their system has been handled very badly, putting customers in a position where they randomly take money off our accounts that is not theirs and then suspend your account for non-payment. This is theft. Cell C now owe me over R1600 and after calling their call centre 9 times and sending many emails, I still have no resolution. My last call on Monday 8th July I was promised that a team leader would call me and we now sit on Wednesday 10th July and I still have not heard from anyone. I have even sent them proof of all payments from January 2024 and they still insist that they don't owe me anything. This is now beyond ridiculous.