Same issue. Trying to get through to them on phone support.

Hopefully found an answer! I spoke to Developer Tech Support and apparently my App Store Connect account was connected to both my Personal developer account and another Business one from a company I used to be associated. I had to leave that old team's account within App Store Connect and then reload. My association with that account is now severed and hopefully within 24 hours I should be back up and running!

FINALLY FOUND THE ANSWER! Call Apple Support. We can't fix it ourselves. They have to fix it manually over the phone. It took waiting on hold for 3 minutes but it's all sorted now. Use the Apple Developer Contact page to get in touch with them. Visit https://developer.apple.com/contact/topic/select and then select "Membership and Account" then "Program Purchase and Renewal" and then select a call back. I hope this helps!