Help want my old number ported back but after promo

So i got a number that i had ported to metro ( another number ) i did it only to get the deal. Once doing this got the deal from metro like $160 for the phone and a month paid or w.e.

The point is can I still get my original number reported it was a metro number i am going to call them and see if they can help me apparently i have to wait a month the guy said or so to do it. Do you guys think i still can do it ? If not i guess im stuck with the one i purchased.