Books-A-Million review: selling dvds to store

So yesterday I brought some dvds to the store and the girl hands me a clipboard with a paper on it and so I thought it was a checkin paper to show when I went well what they didn't tell me was that I was signing a paper surrendering my movies if left over night well since I didn't know what I signed and didn't return to the store till this morning I have now lost in my cost over 300$ in movies kinda mad about the fact