Poor service from FNB CONNECT

How pathetic is this. I have a FNB Connect contract. I would like to do a change of ownership, because I would like to retain my number. The debit order is running from my fiancés account. And I want to change it to my dad's account, as she is closing her account with FNB due to numerous reasons of which one is poor service. At first they said it is possible if my number was a FNB Connect number. Now they are saying they can't, because my number was ported to the network. And no one can explain why? Logically I don't understand how one person says it is possible and the other say you can't? This is a mere change on the system, but I think this is FNB Being petty full!