WHAT DO YOU HAVE TO DO TO GET A CONTRACT CANCELLED WITH YOUR PATHETIC TEAM

I have been trying to cancel this contract since January I have written endless reviews on this site. I am currently on hold with this so called service provider for the 10 minutes and now they have put me through to retention department with a client service provider who is clearly NOT capable of dealing with a upset client, AGAIN a month to month contract mweb does not have a penalty clause attached.....what do we as south african in a world that is devastated with cash flow issues have to do in order to cancel a service that we have not used but been billed an additional amount based on usage, contract nul and void in any event