I used Sign in with Apple on Kickstarter but my emails started bouncing and now I can no longer login
I used Sign in with Apple on Kickstarter but my emails started bouncing and now I can no longer login. I've contact Kickstarter support but they said they can't help since I used Sign in with Apple. What can I do?
I know I have the correct username and password and it doesn't work on my computer, iPad, or iPhone.
Windows, Windows 10