1 month ago, the account that you placed as your main one should have recieved 50 cents.

Unfortunately, there was no in game notice nor anyway to really realise that it was from the queen contest unless you kept up to date with Evony and how it functions. It was not a package of any kind! The cents were placed directly into that servers account and you never would have noticed unless you checked it on a daily basis. There is a mild chance you spent all 50 cents already because you didn't realise it was in there, and perhaps you ran out of speakers or something thereby having it deduct cents for you to speak in world chat.

That is just speculation as to why you might not have those 50 cents anymore (in other words I can't be certain why you no longer have it, so I put down what I say as the most likely cause) or perhaps you put another account down as your "main" account.