<prompt> Human: We paid our 300 deposit and our apartment complex applied it to our first months rent online. Our first month was supposed be amount X but when we logged on to pay it was X - 300. We paid the amount due. Basically we used our deposit as a credit to our first months rent. Now they want us to pay the 300 again. They admitted their mistake. What do we do? Edit: Thanks for the prompt responses. Ill pay my deposit again and keep in good standing with them. My intentions are not to get a cheaper deal from them, just to do whats right and not be blind sighted. Thanks for your help. Assistant: You pay the money you owe.Human: We have already paid everything we owe. They just took our deposit and used is as a credit. They said this was a mistake. It were reversed, Im not sure they would fix it.  <response>: The deposit isnt supposed to be used for first months rent, so, no, you havent paid everything.You know this is a mistake. Pay the 300, which youd get back once you move out anyway. 