We're aware of an issue with Facebook purchases for all King Games and our team is on it. 🛠️ Hang tight while we fix things! You can still enjoy the game, and we'll keep you posted once it's solved.
if you log into your King account in Kings website, you can change your profile picture there. I don’t believe you can change your profile picture in-game, so I’m hoping that someone sends you the website that I mentioned before.