seuda shelishit when shabbos is on erev yom tov

My shul is telling me to eat by 4:02. Can I not eat bread after this time? Lets say I am not hungry yet, can I eat after this time? till how late? is it OK to be yotzei with fish, meat fruit under these circumstances?

Basically, I need some direction from the Rav on what to do.

Thanks