Webstore Issue & Error Code 9.0 Need Help

I have tried getting help with EA support and the in game help chat, but no luck. Whenever I try to sign into the webstore to claim the free relic 10 calendar, it asks me to link my account, but my account is already linked and I have logged in several times over the years using this email. When I try to unlink my account in game, I get an error code 9.0 message saying my connection is bad, but it’s not. I’ve tried uninstalling the game and signing out of Game Center multiple times, but I’m still having the same issue.