Hi, I have a problem with Yellow Pages advertising company. They have placed my business ad with 4 mistakes in two words making look it rather like a joke. When we discussed the case with them they recognized mistakes and allowed 50% off for monthly payment, while I was insisting to break contract (made by phone) with them because of harm to my business they made. Now they keep sending me bills with request of 100% payment and threatening to put my case in collection. What can I do with this, and what is my legal right in this case? I appreciate your answer in advance.