6 + months of poor service

In December 2014, I was notified by VODACOM, via sms, of repairs to be made on towers etc. This maintenance should take 6 months. <br> <br> During the past 6 months, the service was very poor. There was every day long periods of time without any signal, which was very frustrating. <br> <br> This \no signal"periods is still going on. How many months do VODACOM still need to fix this problem? <br> <br> I am serouisly looking for another service provider"""