Same thing happened to me when they did the switch in December to the new affiliate system (same time they had the downtime and I lost every regular player I had earned for over 5 years… so beware these people).
Anyhow, I wrote to everyone on that darn list and it was Hemant who finally came through in the end, even after emailing him over & over on it.
Customer service is basically horrible with PartyPartners. Email every address you can find. Try this one if you haven’t yet: [email protected] and also [email protected]. Tell them that you may not be receiving the email in the lost password because you are NOT in their system and need to be setup. That’s what it was with me.