Friday night we stopped at a restaurant about 4 miles from our house for a beer and a bite to eat. The check came to $30 and change. I paid with a credit card and added a 20% tip which brought it to $36 and change. I made a mistake when I filled out the slip and put $26 for the total, which I realized after I got home and was looking at the receipt. I checked my credit card account on line and saw that the restaurant had charged me the cost of the meal, $30 and change, this meant my waitress didn't get her tip. How would you handle this situation?