I think that if you are unsatisfied nd you talk to the person that gave you the service like a haircut then either they need to fix it so you are satisfied and won’t have to pay someone else to re-do the cut or if i didn’t want to let them cut even more off of my hair i’ll just tell them i’m sorry in the past i enjoyed my experience with them but i’m really not happy. I will tip them the minimum 10% because they did still spend time on me and not have as many customers. also my hair is like to my hips so both ways a person deserves something for working with it 
now if it’s like a restaurant and the waitstaff didn’t take proper care of us, showed us rudeness and gave me an unpleasant experience then I would leave them either 10% at most or nothing. There have been times when I left nothing and even told a manager about why i’m not going to be tipping. Many times management will try to fix things so it’s always important as a customer to speak up.