I'm so sorry that this happened
Firstly try to get some rest, sleep, some food/drink and all other primary needs.
Please don't be hard on yourself there is way to get exit from that vicious cycle, you are not alone, many of us have similar problems related to some addictions.
Have you been in so me therapy regarding it (CSA included)?
Somehow it is not wise from your father to give you such amount of money considering how serious your problem is and how tempting that could be
I don't have some advice for you beside that you need to ask for some help, that should be your priority and please don't be scared of it. It is too much at stake
Return to your home where you could be under reach to abusive person as your mother is will not solve anything but rather bring more problems that already caused all this.
Please read this article about self destructive behaviors, it is based on dealing with addiction problems and not particularly with gambling problems but I'm sure that could be helpful in this case too:http://www.malesurvivor.org/ArchivedPages/singer2.html
Hang on, here is my hug for you