Unprofessional conduct

I have made arrangements with Action TV for an installation at 11H00. I was told they would contact me on the day of installation to confirm the time. I had to call them on the day of installation when it became clear they are not going to call me. After giving them all the specifications of TV, wall mount etc. for a second time the 11H00 installation was confirmed. Since it is a different location from my office I had to take special time to meet them at said location. At 11H15 I called to hear where they are since I had made arrangement for 11H00. They were still shopping for the wall mount. Why not first shop and then agree to the time? Why do I have to call you? I don't have the time to sit around waiting on unprofessional people to arrive 30 min or more late. We all have work to do. I was told in a very unprofessional manner that they don't want my business. Well, I thought in a post pandemic era we are all desperate for all the work we can get. Clearly they are not. Some companies will survive and some with this kind of unprofessional attitude will not. There are plenty of fish in the sea. Good luck!