Is it possible to retrieve the account?

Hello @candypopop🤗 A Warm Welcome to the King Community!

I am sorry to say that it is not possible to retrieve a deleted account. How long has it been since you sent the request to delete your Dad's account?

But, you can create a new account and send a request to the King Player Support team, asking them if they can restore the progress on to that new account.

If you have any questions, please reply by typing below🍫🍫

Hello @candypopop🙋‍♀️ Good Morning!

Download Candy Crush Saga and log-in with the Facebook account. Then, send a request to King Player Support team through this link —> https://soporto.king.com/contact

First, inform them that you have accidentally deleted the account, and see if they can ignore the request!
If it is not possible, request them if they can transfer that progress to the Facebook account.

Other than that, there is nothing you can do, but inform your dad!
All the Best🍫🍫