How do I get the money that I worked for?

I was hired for a lady who has 7 children. She had general rules but not detailed. On my first day, I was left alone. After the first 3 hours of my shift for her to go shopping, and I followed her schedule. No punishment allowed just redirection, cannot raise voice to children, must follow routine. I started circle time and had all 7 children sitting while I was reading a book and I was interrupted by circle time is at table and we sing this song and review weather, no reading books. On her schedule, it just said 9am circle time. I did not feel welcome from the gate and did not feel comfortable. The children have their own entrance to the house where I also entered and I was not allowed in the actual house just in the room that they called a classroom. I worked from 7am to 5pm with no break for bathroom or lunch. I was not allowed in kitchen to prepare lunch or get myself water. I felt as though the mother was not informing at all just would give me a simple thing to do and not specify on what she wanted. Another example is, go outside to play. Where I park and entrance for classroom is there is a swing set so I took the kids there. Less than five minutes later, I was being told that in the morning play I have to go to fenced in area behind their farmhouse by the barn. Again, I apologized that I didn't know that they had that. My first day I came at 7:06, 6 minutes late because I was lost and informed her I was lost. She fired me at the end of the day. Tuesday, she asked me to come back, than fired again on Thursday. I worked 31 hours and was told check will be mailed but never did. I've emailed and called and have been ignored. That is over $320 dollar loss. Her husband called saying that I was not what they were looking for and I'm not a good nanny and should change my career and she was scared for the children, and that my four reverences lied for me therefore no money is owed.