My parents borrowed money from me...?

My parents borrowed five hundred dollars from me back around christmas. The money was a present from various family members. They originally borrowed two hundred and sixty dollars, then another additional two hundred and forty. We had originally agreed to have it paid back in TWO WEEKS. My father doesn't work. My mother sustains us well. Well, I ordered about seventy dollars worth of clothes on line, which came out of what they owed me, but half of it needs to be sent back (my mother promised to do so two weeks ago) and i was repaid one hundred dollars, with which I bought birthday presents for a my best friend and a valentine's present for my boyfriend. I spent the remaining twenty on myself. My mother promised to pay me back the rest the following week. She then ran up her credit card so that I couldn't order anything online (I always ask and make sure she knows what I'm buying first, it's not like I know her number or anything) and hasn't paid me back...(continued)