Hello , hope you are doing fine

I want to tell you that if you have filled your roll no. wrong while marking OMR sheet but correctly while writing in the blocks , then don't worry you'll get your result.

Same has happened with many people before but they got their results in the end.

But just to be extra sure , do email the authority which conducted your exam and let them be aware of your situation , so that you'll be fully relieved. You can email them or call them on their helpline , whatever works best for you.

I hope i was able to solve your query.

Thank you