Sonic Drive-In review: employment

I was recently fired from Sonic Drive-In located in McMinnville, TN. To start this process. I had asked for the the Crew Leader position. I was already working the hours and completing the task of a Crew Leader; the only thing I lacked was the pay for which I deserved. I am a full time student in college, I live alone, and I hold a full time time. So in a result of all that, I had over slept one day. I contacted my manager as soon as I woke up and informed them that I could come into work. I got no reply. When I returned to work the next day. I was informed that I was wrote up for the first time and they filed it as my third write up. That is lying on government forms. Than I was working day that I was not scheduled for. I had a rough week for I told my manager that I needed a break (a day off). I had already had another employee covering my shift. She did not reply, again. Later that night I received a message from another employee. She said, "hey girl they wanted me to let you know that you're let go. Im sorry:(". That was word for word how I was "fired", it is stated in the Laws that you CAN NOT fired an employee through another Employee. It MUST be a member of management that informs the employee that they no longer work there. This is just a few out of many, MANY, laws that were broken during my time of employment at Sonic Drive-In, McMinnville, TN, 37110.