Where are my minutes?

A few months ago I was called by a Vodacom agent and she offered me an upgrade option that I accepted. However, after realising that the upgrade did not include any free minutes (which was included in my original contract), I opted to revert to my previous contract. A month later and this did not happen. So I contacted you again and the revert was put in place, but without the free minutes that were included in my original contract!

So, I had a 10gb and 100 minutes (and sms's but who still needs that? seriously), then upgraded to 20gb (no minutes, which was not mentioned to me) and so I reverted to 10gb and the minutes, but now the minutes still aren't included! Admittedly, my bill is less, but that's not the point. I had free minutes in my original contract and now I have to buy airtime, which is much more expensive.

So final option, Vodacom, revert me back to my original contract which I had for the past two years, with the minutes included, or I will shop for a new network provider.