USA Nails in Strathaven

Do an average job , but very unprofessional customer service and seem to find their bad manners acceptable.
A friend made an appointment by phone and after waiting 25 mins past the agreed time, asked when she would be taken. Was given a blunt answer 10mins, to which she replied that she would be late for another appointment so would have to leave. She received without even a head being lifted another blunt OK. She left the shop disgusted. Also they have been in these premises for a few years now and make little or no attempt to speak English. They are usually speaking to family in their native country on phone or tablet while doing your nails and don't seem to be aware of how bad mannered this is. Will not be returning.