I  Told several times that I don't know username Why u people not understand I know only registration no

Dear student,

Please calm down! I haven't read the answer of the expert who suggested you earlier. All I wanted to say that learn to write your important Id and password of the thing in some notebooks which is so much important to you and in case the problem arises like this. You could easily get that from your written data. Anyways, you should get a helpline. Visit the link. Here, you will get the no.s from where you can take help.
www.cusat.ac.in/contact.php

I hope this will help!

But this doesn't work I think I have lost my user id