Early access issue

Hello, yesterday I purchased Early access suporter pack on my account. When I activated a key in Steam, I realized that this key only activates the client in Steam, but does not provide early access, which in turn was already given to the account I purchased it for. When I try to add my steam to may path of exile account, the following error appears: "You cannot merge two accounts with the same login methods". What do i need to do to be able to play poe2 on my steam, withot buying another access pack?