Hey

I would like to tell you that as per the official guidelines, it is compulsory for you to present your PGCET fee challan. As you have lost it, you can try to go to the bank where you paid the fees and ask them for a new challan.  If you have the online copy of the challan, take the print out of it or else carry the photocopy. However, it would be smart to contact the exam authority to get the right solution to it.

Good Luck