A PUK is a "Personal Unlock Key" and is used for unlocking a SIM blocked by incorrect PIN entry.
A PAC is a "Porting Authority Code" and used for porting mobile numbers between providers - I think you mean this.
The normal process here is for your new SIM to be supplied with a temporary number. On first connection to EE's network, the phone is fully functional and your PAC is then submitted. That will trigger port-in of your number on the following working day.
Where are you in that process, and what day did you first put your SIM in a phone and connect it to EE's network? Do you know anyone else locally who uses EE, and do they have any service issues?
