Good morning.
You'll need to speak to the original number hosting company for this number, ask them to make it active again. Then if it's active, we can put through a porting request.
What's happened here should never have happened as it's two completely seperate accounts.
The only way this should have been able to happen is that you would have done a transfer of the old account that was previously at the address and not have a new customer account. The form does state keeping a number, however, this is a number you previously had with your previous provider. Sorry for the confusion regarding this
Kind regards,