Bad customer service now left in a bigger debt

I have been a rain customer for a while now.

I have not been able to use the service for a while. I had an issue with my bank account and noticed that I was being billed even despite no usage on my account (which can be seen on my invoices).

I had attempted to rectify this and have not received any feedback. I cannot even cancel and reapply because the system does not give me the option to cancel my current package.

I am being charged over R2000 now which I cannot afford even though when the error was picked up I had made an attempt to fix the problem and I actually wanted to change over to the new plan that they have on offer.

I am left with no wifi, a high bill which I cannot make an arrangement to settle due to a lack of response from the company.

I am not leaving a 1 star review due to the actual network but rather for the customer service.

I would love to be on the new plan and do not mind continuing with my normal payment or at least the new amount but how am I supposed to afford to pay out almost R 1500 extra for something that was never used.