Purchased a game with DLC guess what couldnt use t...

Purchased a game with DLC guess what couldnt use the DLC bc the code had already been used. Now logically that may have clicked with some but for me I assumed I was getting what I paid for. Now I have a game that I have to spend another $30 dollars on making it the new price so what was the point? If you think like I do there was no point in using this store at all. I would simply like to say how fare they sale anything under false pretenses?