I had a full season account for the last 4-5 years. There contract expired Jan 1 2007. They were paying me XXX dollars a month averaged out for lawn maintenance, etc.. Snow was per time. The snow contract was for the same term just per time. We had our first plowable event on 12/06/07 so I went out to pretreat the parking lot and sidewalks. As the snow increased to over 2" I went out to "open" the drive lanes and parking spaces as I always did. When I arrived someone had already done it. I went inside to talk to the owner and was told they had found someone else cheaper to do it. I responded that we still had a contract with them to the end of the year. She said they assumed that since I didn't call ahead of time that I wasn't coming so they got someone else. Well the contract states that they are to notify us in writing 30 days before they cancel. I recieved a call from the manager begging us to finish the contract so I said I would. We plowed the event and sent a invoice. $600.00 or so. After reflecting some on the matter I decided to terminate the contract since they already had a contractor to replace us. In the mean time we finally recieved the most hateful letter from them cancelling the service. Today I recieved another letter from them saying they were not going to pay the invoice for the snow removal we provided. Me question is since this is a business how do I go about collecting this money from them. It's not the amount of money , it's the principle!!!