Double bookings my Foot!

Good day, I have been in contact with Orchid Day Spa Cutty Sark Hotel Scottburgh for the past month trying to get an appointment. On four occassions they advised they fully booked, I was trying in the month of December and could understand them being fully booked, on the 23rd of December I asked for the first availability date which was set for today the 5th of January, I happily took the booking. This morning at 7:40am this morning i requested confirmation of my booking. At 9am it was confirmed, I further received a call at 13:06pm asking if I was going to show up at 4pm which I advised I already confirmed but they advised they are running late by approximately 15/20mins, which I didn't mind.As I drove to the spa at 16:01 I got a call advising that they had double booked my appointment time and unfortunately I need to reschedule. For me this is appalling service..how does 1 who booked 2 weeks prior get double booked! Does this spa not have a proper booking system? Anyways thank you for your brilliant service...you won't see me again!!! I'd rather travel to other spas that honour their appointments. Thank you for wasting my time and fuel.