hy jitu!! 

Getting 500 marks im NEET is a tough task amd we believe that you must have studied a lot. But to be honest , as you also know abouy the increasing competition, there are chances of you getting a government seat but this cannot be assured. The cut off is always dynamic. It changes every year so nothing can be said very surely. But with 500 marks you definitely stand in the competition.

Hope it helps!

All the best?!