Welcome to the Pet Rescue Community
Do you need help with your game? Ask the Community for help.
The game used to be available on King.com but isn't any more. I suspect the email was just a standard message that they have to copy and send (note customer service are just an answering service, they do not play the games, so don't know the specifics of what is going on, so would not have realised it was out of date)
You can still play if you have the Pet Rescue Saga app installed on a mobile device (phone, tablet etc) or use the Windows 10 app.
You would need to have it previously installed and synced with your facebook game to continue where you were at in the levels though, as logging into the game with facebook is where the current problem is 😕
Bubble witch left FB altogether as its easier to do constant updates to devices. However these haven't left, the rest of the games have vanished into a synchole created by Meta it seems likely as their own feeds/messages/posts/comments aren't working properly either.
They will reappear and all will be as it should. You can still play on mobile devices or windows 10 depending on the game app right now.