Don't know what to do anymore

Honestly I have never in my life experience a situation where a business can't seem to take your money so that you can use there service. I've been two months with supersonic now using their fiber service via vumatel reach and the first month they had a issue with debating my account which they got resolved on the 6th October now the second month same problem. According to them they tried to take money out the 4th November which wasn't successful I and I have money in the account. Been calling them since then they saying they will escalate the matter . Today is the 11th November got off the call again and the same thing now remember they telling me everyday they will escalate the matter. When asking to speak to a manager they say No1 is around. During this time they asked me to confirm bank details which I've done they have sent me a link that does work and doesn't give me a option to make payment as it says error the one that does charges R0 to the account when trying to make payment. Ive asked can I take it off recurring so that I can just buy a voucher to get the line working I can't do that and if they do it will take 5 working days. I've been offline for the last 10 days now also when asking to cancel so that I can go to another provider I'm told they can't do that as a active case is running.