Originally Posted by irishguy28

You will really, really struggle to get Vueling to entertain any request to rebook you.

With no details whatsoever, we cannot give you any advice. You have not said what route this involves. Or whether the route has been entirely dropped, or only the flight on this particular day. You have not said what other Vueling flights may be operating or acceptable, or what exactly your "best" replacement flight would be.