Visit
https://support.freephoneline.ca/hc/en- ... er-carrier, and read that fully.
The address mentioned is the one that's listed after logging in at
https://www.freephoneline.ca/update911Info.
The only other address I can think of would be the one listed on your original FPL VoIP unlock key invoice, but the billing address on the invoice shouldn't apply. Instead the current service address should. If you need a copy of the invoice, you'll need to submit a billing inquiry:
https://support.fongo.com/hc/en-us/requests/new.
After porting out, you will lose your VoIP unlock key and any World Credits you may have, and your FPL account will be automatically terminated.
If you provided all information accurately, meet the required conditions (from
https://support.freephoneline.ca/hc/en- ... er-carrier), and continue to be blocked, you can file a complaint with CCTS:
https://www.ccts-cprst.ca/for-consumers ... aint-form/.