Vodacom do not want to Port my number

On the 28th of Jan 2016 my contract was cancelled in paarl vodacom. I paid my quotation of R120. On the 29th my debit order went off and the 4th feb i went on pay as you go. My number were not ported yet on the 5 feb 2016. And then they said i owed them R60. Which i did pay same day. On the 20 Feb they said i owed them another R28.50c which vodacom herm**** paid. On the 24th my number still were not ported. Then they said it can not be ported because i am on the 3D system. And have to wait seven to nine months. The only way that i can port my number is to migrate to another system from vodacom and that can only be done on the 13th of march. So i would like to know why did they not tell me this from the beginning.