Vodacom signal

I don't have access to Vodacom WiFi since last year November. It's almost 3 months now paying R420 for a WiFi contract and R400 for a cellphone without a Vodacom signal. We complained at Vodacom Autumn Leaf mall but it seems as if they don't want to fix our issues. Imagine more than 7 colleagues who are paying for their WiFi contract while we don't receive any service for that. We reside at Nietverdiend, Zeerust. We are teacher's and can't get hold of resources needed for our jobs because Vodacom decided to ignore our cries. Why must we keep on paying for services that's not fulfilled??? Can you please help us...