+1. Do you have kids? Sounds like they schedule you on those days because everyone else has "a family." Excuse me, but I have "a family" too--ME!! Now you're the go-to person for holiday and weekend work. Can you talk to them and try to change their perspective? Remember, you can always say NO. "No, I am not available to work that day." PERIOD. No reason needed.

Best of luck and I hope you get your money from PayPal.