Is it normal to put a ridiculous amount of time into a pointless job?

So I got offered a job two months ago. I'd been bumming off of my father, mostly just driving him around, fixing things around the house, etc. Simple stuff to help. But I tired of mooching off him. I got a call from an uncle of mine from a less reputable side of my family, offering me a job. $100/day+ Room and board. I was promised a bed of my own, and a peaceful office to do data entry(all i was supposedly required to do)and whatever other basic necessities I needed. I am now entering data, work around 20-100 hours at a time, get screamed at for sleeping all day when and if I do manage to get any sleep in, I'm managing a fueling station, data entry, and also helping truck drivers fill out paper-work, all while trying to keep the office in somewhat workable conditions. I've purchased necessary appliances, food, and water for about a month now with the help of another co-worker. I haven't been paid in a month. I don't know what the hell to do. I can't leave being 3 grand out, it's not feasible. I don't have enough money to get anywhere else. What the hell do I do? Anyone else have problems like this? Is it "normal?"