Dear Aspirant,

The kind of error that you mention, might have happened due to technical glitches on your or the examination authority's end.

What you can do now, is write an e-mail to the authorities expressing your concern and what steps have to be taken now. You should also send an image of your id proof which has your complete name, as it was supposed to be in the hall ticket.

During the examination, you can carry your valid identity proof to avoid any sort of confusion or complication.

You don't have to worry, you will not be debarred from appearing in the examination.

Hope this helps!