Disappointed customer

I had done a new set of nails with tips ,in 12 days 1 fell off,considering my nails are not in water,no washing dishes or clothes. No forceful break off. It just literally fell off! I booked an appointment to repair, under the assumption it was complimentary, then walked out with no one asking me to pay. When I was shopping in the mall I received a msg to say that I had just left without paying... I went in to pay and was addressed by Tumi who said that the policy is 7 days ! I asked for the manager Melissa but she said that she was on holiday. I am dissatisfied and disappointed as I made good relationships with other staff members . I go in twice a month ,this is the first and last! To the manager train your staff on customer satisfaction because word of mouth is bad for business when your staff have this attitude