Disastrous service from Vodacom

I live in Kensington B, Randburg. I have been unable to make or receive calls at home (and I work from home) 95% of the time since November. Vodacom confirmed that they have a problem with the "Tower" in my street, Van Der Stel street and that nothing can be done for at least 6 months as they have to get authorization from the municipality to erect a new one. They told me that I need to cancel my contract with them (That ends in March), they will not charge me penalties, go onto pre-paid so I can port my number to another service provider . I have tried to do this now for 3 months without success (and don't go to their shops, they cannot help you, even tried their H/O, the landline is not been answered).I have spend hours trying to get a hold of them from my car (as long as it is at least 300 meters from home or I go to the local shopping center parking lot). IF and WHEN their various "call centers" answer after sometimes hours and I have tried various ones, they promise to "escalate" my complaint and revert back on e-mail (as I can't answer calls at home if I don't have a signal). NOTHING! This morning, lucky for me I was not home, got a call from them asking me if I am happy with their service and if I still want to cancel the contract I have had with them for 6 years. The last "record" they have in their system is dated....November. Every calls I made since then does not appear. Mind boggling. I am loosing 1000's of Rands in lost business. Anybody out there that can help? I am desperate.