Another empty promise

I have called, complained, cried, shouted, logged a complain on Hello Peter...... and guess what, no reaction from Vodacom. I am at my wits end, and going to a branch is also not an option, because they can not help me, they just log another complaint on my behalf, and "escalate" please can someone advise me how to get out of the contract of the service provider that doesn't provide a service, without costing me a fortune. Such a big disappointment after 10 years with them.