Sounds like you might need to have a talk with your pool service and get some details about what they are doing. As far as pump run time goes, 4 hours per day may not be enough. Probably more like 8 hours per day. If you are having cloudiness issues after they are there, perhaps you need to run the pump 24/7 for the next day. But...... you really need to find out what is going on. I'd be concerned if my pool was only getting attention once per week. Are you saying that testing and chemicals being added is only happening once per week?

Maybe somebody else has some different ideas.