How do I deal with this? I have no support from anyone and no one to talk to about this.

I want to take her ipod, computer, etc away as a punishment for punching me but can't because I will be punched again! I don't want to lose my teeth! I had a bloody lip last week.

She is on ipod all hours day and night, 3 am, etc. if I tell her she can't see her friends, she will say fine, I will just walk out of house and leave.

I threatened to call cops and press charges if she punches me again, and she says if I do she will tell them that I hit her. problem is I used to hit her when she was younger (which I know is why she is doing this). She will claim child abuse and in reality, she is a victim of child abuse.

we live with my parents right now and they are no help. if I take computer away, as soon as I leave to go to work they will give it right back to her. if I try to enforce a rule, she will scream really loud and parents will come running and tell me I am kicked out of the house!

my parents send me to my room (yes, I am 45) in front of kids, they also belittle me, and give me evil looks. they slam doors so YOU know they are there to try to enforce a scare. I have to watch every little noise I make, if something drops by accident I get yelled at.
I wish my parents would just die so I can finally live my life. I feel like I have been in prison my whole life and I can't get out! I am very depressed and just want to die. I have no friends left and no relatives except the a holes that I live with.

I am too depressed to even get ahead in life. at work, I keep starting to cry and have to hide it so no one sees.
how do I get control over teen????