Not sure what I am doing wrong

We just got a brand new hot tub about two weeks ago. We had our water tested when we first got it and had to up the alkalinity. According the the test strips, Alk and Ph look in the right area. But we keep having 0 chlorine and now have cloudy water. We have only used it 3-4 times. We have rinsed the filter as well. The hot tub store we bought it from gave us chlorinating concentrate ( one step fo sanitizing and oxidizing) , simple blue simple spa and Simple Blue Simple Stick. We are running our hot tub on one of the filtration levels( I believe it's 2x a day).

I have been watching videos to see about what we are doing wrong. One guy I watched said to add spa marvel every 3 months or so and then we only need our chlorine at 1ppm. He says that we should add stablized chlorine granuls 2-3 x a week. Then when we shock( which should be after being in it?) to use no chlorinated shock for. oxidizing. Should we shock the hot tub after using each day and then adding chlorine 1 time a week if needed after testing?

Could our issue be that chlorinating concentrate is not the right stuff to use ? I should have granuals and the shock?

How do I get my hot tub water to not be cloudy?