they refuse to assist me

I took out a Vodacom contract and I wanted to port my pre paid number. I spoke to someone by the name of Pulane who told me to use up all my airtime and data and call her back then she can port the number. I called today to do it and the call centre refuse to do it I asked for Pulane and no one know who she is. i told them i called in last week and that Vodacom was willing to do it but now no one can help me.