Cannot login, stuck at “Select a Merchant and Marketplace”

Like the title says:
Cannot login, stuck at “Select a Merchant and Marketplace” where the Select Account button is greyed out. Chat and Phone have been useless, no email address. Seller support effing sucks. Any solution? I had an order get cancelled since it didn’t ship but I can’t even login so….. ??? WTF Amazon? Anyone that has any answers please help…. and no, don’t suggest different browsers or cache clear etc. I’m looking for like real ways to speak with Seller Central, they want you to login to contact them but that’s my whole problem in the first place FFS!

Thanks