ifs flooring

The story was that they were supposed to do the additional install and I put more than half down. When the install was complete we were supposed to have a payment due whatever was remaining 60 days later. I got a call today from the flooring guys and they hadn't finished their job. There was an issue on a Friday late where they couldn't finish so they were supposed to call or come back the following week. They never came back; they never called. Well, it has been a couple of weeks, I guess maybe even a month now. I got a call today asking for payment but payment isn't due until August 29. So, when I went ahead and explained that I wasn't going to pay for 60 days because the work wasn't done; and it wasn't done to my satisfaction; there were a couple of issues. They became irate saying that I owed them money. I explained that the work hadn't been done and, by the way, the invoice wasn't due until the end of the month. So, the short answer is I got a message from the owner that said he needed me to call him to discuss payment terms on this job. He said he went out on a limb for me and that he needed his payment and he expected it now; otherwise he would lien the job as of tomorrow.