Very very very bad poor service

I Have been experiencing problems with my pocket wifi router since last year. I phoned and complaint many times. Last year november the device was exchanged no reason given. Not even 6 months later i am sitting with the same problem and no results from vodacom. But I have to keep paying for my wifi but I can not use it!!!!!! How the hell !!!! O and I am still waiting for someone from tech to call me back .. will probably happen when I am 80