Hi

You must have got username/ email id and some password while registering. Check the email id with which you have registered. Inbox and spam check both or try recalling if you used mobile no then in that case they should have sent it to your mobile. The only reason forgot password doesn't work is you might have entered the username or email Id wrong it will give you prompt hence check for those again. Check the pdf or printout of your submitted application form there might be details like application no or email id in it.

If you forgot both username and password try getting in touch with their help center. Do this before they disable it as they do it one day before exam.

Let us know how it went or if you still facing problem.