Forgotten username and password :
If you have forgotten your username, then there's a nifty way to retrieve it.
1. Go to this link: http://giffgaff.com/support/lost-password
2. Type in your e-mail, phone number or username in the field.
3. After this, press submit and you'll receive an email with your details, and a link to reset your password (This may take some time - But it'll come!)
Alternatively, check your emails for past emails from giffgaff with your username, such as a private messages, as they contain your username. If you're unable to do the above - Please use the Educator system above - detailing your phone number, SIM Serial number, your name and address and any other info you can provide to help.