So I've created 4 Amazon accounts all using different emails, and no matter what I do, I can't sign in to any of them. They all give the response "Your login can only be used with the Amazon shopping app or Amazon Prime Video app." I looked for answers everywhere, and I tried contacting customer support only to come to the realization that I CANT CONTACT THEM BECAUSE I CANT SIGN IN. There's no public customer support email to contact. If anyone has any solutions please tell me.

tl;dr
Can't sign in, can't use my account for anything, can't contact support