Pay attention to your own requirements when communicating, such as what color your hair needs to be dyed and how to do bangs. All this needs to be explained to the barber. Many times you complain that the barber doesn't understand your needs because you don't explain your needs clearly to others.
If you don't want to be slaughtered, you can know online in advance what potion your hair needs and how much it costs. Knowing the price, you can estimate how much you will spend.
In fact, choosing a store with a good reputation will not be slaughtered. After all, there are many customers in this store, and they can't kill anyone. So choosing a good store is still the most important.