Disappointed with Barber SA

Good afternoon, I was very disappointed when my brother-in-law went to go and cut his hair at the Barber SA in the Mall of the North shop only to find the barber saying that the machine can not cut his hair as it is curly. I have always cut my hair at the Barber SA but after this experience i will never use their service again. Please advise as to what type of hair you must have for people to use your service.