Hidden changes to Caller Line

Hi

6 days ago I agreed to take an offer from a Mondo call agent that offered me a Vodacom 20gigs + 20gigs plan for R200pm. I wanted it to work on my existing Vodacom number. Then all my incoming calls were Unknown. I called Vodacom & they said I am now under contract & not prepaid so I will have to pay an additional R10 per month for caller ID. Now I find that my call rate of 79c @ per second billing is now changed to R1.85 @ per minute billing. My understanding was that I was buying a Data plan but now my call charges have changed without my consent or previous knowledge. I am within the Consumer protection Acts 7 day grace period & I would like this contract cancelled & my number & sim card restored to its previous Prepaid account. I was forced to write this review as Vodacom leaves me waiting as they refused to take my calls for cancellation. I called Mondo & while waiting, my call gets dropped. Regards Akash