On the main login page at passwordplatform.englishlanguagetesting.co.uk , look directly the password field. There is often a small, greyed-out hyperlink that says "Forgotten your password?"
It is frustrating to face technical issues before an exam. Here are the most common problems and their fixes: On the main login page at passwordplatform
Duplicate accounts cause score-reporting conflicts. On the main login page at passwordplatform