Still no help from a so called top brand service provider!!

Hi, i sent a review approxamately 3 weeks ago on the terrible service of thos cellular network in my area, i was then contacted via email saying they shall assist me in the next few days, strangley i am still waiting. I am quiet certain that in the 3 weeks that has passed vodacom could have assisted me and sorted out this issue that has been going on and me complaining about for the past few years.... All my neighbors have moved to another cellular company but i have stayed loyal... Is this how you repay loyal customers..... Bet if i went into my local vodacom store tomorrow to cancell my contract which i feel i am well within my rights to with this poor service they would come up with a million reasons and extra payments to discourage me..... Do i approach legal help....