Hi Adams1302 thanks for posting and welcome you our community.
I am sorry for any confusion around your PAC. Are you still currently using your number with your former provider? If so you have 30 days from the date the code was generated to activate it. If it expires on 25th August, then I would recommend using it by 23rd August to be on safe side. However if it goes past the 30 days, you can still get a new PAC issued by your existing provider.
Regards
Lee