Sent another message this morning reminding them to be there or cancel 4hr before, some notes and a reminder that they don’t have enough time now, and don’t chicken out. Straight up says they promise, no greetings.

Nope. Message 'em back and say “Sorry no longer able to assist you”. If they ask why just be blunt “Mate, you were disrespectful as heck, I was helping you as a favor, if your gonna be rude then I dont have to do shit”