We have a customer that we no longer wish to do business with. They make our job very difficult (ie. if there is a single blade of grass sitting on the mulch in a flower bed, they call us on it and demand that we go move it (no kidding))!!!! I need to write a letter of cancellation to them and can't find the right words. Can someone help me out!? Our contract requires that either party give a 30 day notice. Some help would be greatly appreciated!!!