One reason why you may be unable to access your account is the website used to create the account in the first place has changed. We have multiple versions of our website that offer products in different currencies. Make sure you are on the correct version of the website before you try to log in.
A way to determine if this is the cause of the issue is by sending a password reset request. If you do not receive the reset email, you are probably on the incorrect version of the site.
If you are unable to locate the reason why you are having issues logging in, please feel free to get in contact with our customer services team.