How would you handle this situation about a care giver and your children. Serious answers only please?

My husband is out of town this week on a job. I had a function I had to attend last night. I knew it would be late when I got home, so instead of using our regular sitter. A teen age girl who I knew would have school today. I called an agency to send out a sitter. She seemed very nice, I left detailed instructions,... show more My husband is out of town this week on a job. I had a function I had to attend last night. I knew it would be late when I got home, so instead of using our regular sitter. A teen age girl who I knew would have school today. I called an agency to send out a sitter. She seemed very nice, I left detailed instructions, dinner, bedtimes ect... When I got home at 11:45 P.M. 2 of my kids 10 & 8 years old were setting on the couch watching TV. South Park of all things. I never let them watch it. My 3 year old was asleep on the livingroom floor. And the sitter was asleep in a recliner. She feed them just mac & cheese for dinner. And then let them munch on junk food.I was livid. And of course today I could not get my kids to wake up for school. I want to do something about this but I am not sure what. My sister says the damage is done. That I should just leave it alone and not use that agency again. I think I should file a complaint. What would you suggest?
Thank You
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