Moscow so far has proved to be a city where you have to cautiously enter restaurants, shops, hairdressers' so that you won't be presented an unexpectedly exorbitant bill in the end.
Judging from my experience, prices are seldom connected with the quality of service. The city is enormous with crowds looking for entertainment, services, something to eat, somebody to meet. So if you're a dissatisfied customer, they don't care much about what the reason of you dissatisfaction is, there will always be others.