Oh well, not Amazon but I got stuck in the ecommerce of a large shop chain. I can't register because they tell me I already have an account. So I use that email to recover the password but I can't because the account must be activated. So I ask for an activation link but I can't because that account doesn't exist. I guess they have different databases or microservices taking care of different steps of the registration process and something crashed at the wrong time and my overall record is inconsistent. I gave up a couple of years ago. I buy from them when I go to one of their physical shops.