25 January 2020
If roll no. and all other credentials were filled correctly than it can be treated as a typographic error and no special efforts are required in that case to get the mistake corrected but otherwise it requires immediate representation to the concerned authorities with the prayer to get the mistake corrected.
27 January 2020
Nothing can done........ because you applied as XYZ...but your name is ZYX
Now your admit will dispatched to you ax XYZ ,BUT if there is option in their website to EDIT your form,you can change there otherwise you need to go their regional office to edit application.But it can't correct by outside.