POPLA decisions are not binding on you and you ca safely ignore them. The same goes for debt recovery agents, you can safely ignore them. Debt collectors are powerless to do anything except to try and persuade the low-hanging fruit on the gullible tree to pay up out of ignorance and fear.
We don't need to know about useless debt collector letters and you can safely shred them and use them as hamster bedding.
Come back when you receive Letter of Claim (LoC).