Vodacom fibre pathetic and service even worse

We have a 5oMb fibre line with vodacom that does not work. We can only connect half the time and when we can connect it is slow as hell. I have tried calling, emailing and logging service requests on the app and no one has ever gotten back to me. Now that I've sent in a cancellation request, they want to charge me R9000+ as a cancellation fee, which is all the remaining payments on my 24 month contract. What a joke. I rep**** to the email that Vodacom is the party in breach of contract, because I'm paying for a service that I'm not getting and that I'm willing to pay for the cost of installation and the router, which is the actual cost to Vodacom, but they are deliberately delaying the transfer of the line to another service provider. Even now I cant get a response and it has been three weeks since I submitted the cancellation.