Zepto is being a Scumbag/cheat

I have notice this quiet often that despite purchasing a Zepto pass which has free delivery on any purchases above 99 the free delivery pass has to be clicked to avoid any delivery charge or surge charge. How many of you have noticed this and have been cheated by Zepto. So basically these companies don't care for its staff and their customer alike. How can it's founder get peaceful sleep when they fleece customers and staff alike.