Aqua Blue Pool Service

I did not have a good experience with their services. I only employed them for a month. I had three no-shows, I had to call them to see if they came, my pool turned green, and they made up excuses and blamed me for their iniblity to provide a good service. I have a dog that gets int he pool on the step (which many people have as well). I have no pool sweep (which many people don't have as well), because we do it ourselves. Then they quit but didn't tell me such until I had to shock my pool from another no-show. My other service showed up every week regardless of weather conditions and my pool never turned green. They told me my pool was too difficult for them to handle. I believe it was too difficult for them to show up. How hard is it to come once a week, test the water, and add chemicals?