Your parents are horrible

They do this kind of thing with me, except against my brother. Offer him everything and anything, give him money and expensive things and drives him everywhere, and then when I ask for £20 when I'm short on cash and need to buy food, which I would always pay back, they say no.
This actually just happened 5 minutes ago as I write this.

My PlayStation 3 keeps freezing/crashing, so I don't want to lose my game saves before my PlayStation 3 ends up crashing/freezing for good, and I'm short of like £20 for a new one, which I can repay back the money on the 20th December, and they can't even do that for me.

I'm feeling really triggered by them right now :'(