Here's some common problems and how it's usually solved...
If you can't remember what email address you used:
Send us a message with your full name and we'll track it down for you
If you can't remember your password:
Enter your email address here and we'll send you out a reset link
If you've tried everything and nothing seems to work:
Provided you haven't thrown your computer out of the window, then try emailing us at [email protected] or start a chat with us using the icon in the bottom right of the screen.