Vodacom not delivering a service

I have had enough of Vodacom charging for a service, but not delivering!

I know the policy (which I think is really ridiculous) is that if in 3 months you haven't used your minutes, it falls away and you start from scratch. In my case 200min. But here is something I would really like to know from Vodcaom, how come I ended on 128m48s the night of the 30th and when I checked my balance Sunday (1st) morning it was down to only the 200min. I have screenshots to prove there were no phone calls of an hour and a half long after 9 at night, to deplete my 128min accumulated since the last month.

Now I would love for Vodacom to make up some excuse again, to suite their rules as to WHY my minutes have magically fallen away.

This has happened too often now. I'm tired of paying for something and the company not delivering a service!