Vodacom breached terms of contract

Vodacom is really and truly terrible. I'm licked into a 2 year contract with them and they refuse to allow me to cancel it without paying a cancellation fee, which is absurd because the reason I want to cancel the contract is due to Vodacom not providing the service IT stipulated in a the contract that IT drafted. My line keeps getting locked, I've called customer care every 3 days consistently since mid February. They unlock the line only to lock it again 2 days later. Working remotely and clients and employer couldn't get hold of me, travelling couldn't call an uber and left stranded, the worst part is Vodacom can't explain why my line keeps getting locked because I'm not owing. I want out of onerous contract, I'm fed up, I'm not getting what I paid for or what I was promised. I've reached out to the Ombudman to intervene, but that process is also taking forever. I'm tired of excuses, I have the statement showing my line was never in arears since I subscribed in August. I'm appealing to Vodacom to let me out, its obvious this isn't working out.