Froyo Cafe

We are customers at the froyo cafe and get an ice cream for our little one every week. As she just turned 3, I prefer not to put the cup full of ice cream, but she still has the choice of flakes, strawberries , sprinkles etc. on top. The lady who sold the ice, was not really friendly all the times we have been there, I mean she even refuses to say goodbye or hello. Sometimes she just said 1, 50 $ without knowing the weight of our ice cream or putting it into the register.But what happened today, was so sad!She said 5 $ without putting the amount into the register and just smiled, we had just a small cup, with chocalate sprinkles on it, and I knew I never paid more than 3 bucks before. I asked her, how that can be, as the ad is showing 49 cent per oz, she said you are such a bad customer, we do not really earn money on your visits, so thats why she put for us a minimum charge per cup of 5 bucks.I was so surprised, because something like this never happened to me before. I would pay the 5 Bucks if it is the way froyo works...She said she would rather throw the icecream away than give it to us for 1,50 $ again. So she did in front of our eyes.Product_Or_Service: frozen yogurtDesired Settlementi would like to buy a small cup at the cafe, as the ad is telling 49 cent per oz, and if the is a minimum required, it should be applicable for everybody and somewhere written