So.... I do not make a habit out of this kind of thing. In fact it's the first time I ever called a corporate complaint line for any reason.
The story: I am doing a fundraiser for a Scout Troop, and needed some change. Went to local McDonalds for lunch. The manager was running the only register (most everyone uses the kiosks these days. After informing him that I was going to order lunch, I asked nicely if I could get four $5's in exchange for my one $20. Immediate reaction: "we don't normally do that". I said, well, can you make an exception this particular time. No but he said he could change my $20 on the order (which would have given me about $9 change, NOT ENOUGH.) I ordered. I take out my credit card to pay, figuring then, he can give me the four $5's for my $20. He still refused. I said, so you're not going to help me? Answer, no I'm not. I called him an asshole and left. Went over to Chik-Fil-A, asked them to change the $20 for the $5's. They did! I then called McDonalds corporate later that day and reported the manager for poor service. Corporate said he will be reprimanded.
GOOD! If there's one thing I've learned about business, is that you take care of your customers and you do it with a decent attitude.