take my money

I had asked in the chat if anyone was selling spawner cages and someone said yes. So I tpa to the player and i gave the money and the player said they did not get nothing then it said I need 900 dollars so i said give me my money back or give me the spawner please. So the player said why should I? I said cause its mine. And that is the last of it........ The players name was Maggiepoodle1