I had my horse in a "fancy" stable near Madrid, Spain for six days...I was SHOCKED! They were tiny boxes with no windows and the water too high up for my horse to reach. When I moved in, there was still the previous occupants poo in there.
But you wouldn't believe the wealth of the other owners and their delicate show horses...
For some people its obviously more important to pay for a horse solarium and private groomer then for what a horse naturally needs: daylight, space and exercise more than 45min a day.
I'm sorry to hear that. Are you going to continue to keep your horse there or are you going to move it? I guess a tiny stall is ok as long as they get a LOT of out of stall time. But if not, I'd say find another place. You want your money to go somewhere that you think it's worth it.