Boost Juice Rockdale

Ok so its a juice bar situated inside the Rockdale Plaza shopping centre and offers the usual juices that any other Juice bar does. Along with the Juices they also have the wheat grass shot. And I am always very keen on taking these as I have been led to believe that they are the healthiest things that I could have to boost my immune system.(health reasons)
So I have been trying to go there literally every second day to take a shot. I was under the impression that the owner would be quite happy to have a regular customer. But to my dismay I have been told time and time again that he doesn’t make any money on selling the wheat grass. And to my utter horror even though he has the wheat grass he has been making excuses to even give it. He wants to save it for the customers who would have something else along with the wheat grass so he can make money. However he would not offer it people who just want the wheat grass (since it doesn’t make any money out of it). I felt terrible and since then I have stopped going there.
I think he learns to take a few lessons in customer service and to be honest I wouldn’t mind paying the extra few cents had he asked for that.