carpet cleaning

I just vacuumed our carpet and I got mad to my kids because I saw some dirty spot in it. Our carpets is so dirty and I know I need it to be cleaned. It has been over a year since they have been cleaned last. I want a professionals carpet cleaning like carpet cleaners chapel hill nc. I hear that they will not miss a spot or stain and do their best to remove them and help your carpet look like new again. I really hope they can save my carpet because it looks awful right now.