since the information you shared is very limited, we can only guess, and offer abstract suggestions.
I am going to take a stab at this, though............was this a rental scam?
Did you wire money (for keys) for a rental you never saw in person.............did the "landlord" give you a story as to why he was out of the area and couldn't show you the home in person?
Was the rent so low it seemed too good to be true? ( that's because it wasn't true)
All of the above are red flags that say............ RUN in the opposite direction.
if this is what occurred to you....there probably isn't much you can do at this point...if it was a listing on trulia, you can report it so they can take it down....but, unfortunately, if this is your situation - your money is gone........just learn so you don't repeat this in the future.
Always verify you are dealing with the real owner or property manager.
Better yet, work with an agent who can verify this for you.
And, if what I described above did not happen to you, then perhaps someone else reading this can make sure it never happens to them!