I worked as a survey supervisor, pipeline router, and party chief.
When the job is over, so are you. That's just the way this business is.
However, when you turn in your two weeks notice and on the last day of that notice they attempt to get you to take a drug screen on a holiday (4th of July) and no clinics are open, so they decide to terminate - more ... you on that last day of your notice. Pretty much chicken s#!t, but I am better off and never looked back.
Maybe try looking somewhere else, unless you are a convicted felon, then they will hire you, and pay you kindly wage. Good luck - less