******* conversion of line/number

i am a prepaid customer and has been very okay with this. my Blackberry messenger stopped working since yesterday evening so i cant chat nor receive emails on my phone. i called mtn customer service this morning for them to fix it becos i usually pay R59 monthly for unlimited blackberry service. i was shocked when the lady that took my call said my line is now a contract one and must call clientele mobile /post paid company on ***, ***. it was a waste of time calling this people as i could not achieve anything positive and i wasted airtime making the calls. <br> mtn must reverse my line/number back to pre-paid, they must also restore my blackberry and refund the R59 have already paid this month Has have been disconnected *******ly. im really angry about this unnecessarily conversion without my approval and my bbm is still disconnected.