Shocking disregard of customer time

Got a sms from Ford prompting me to book my Ford Focus for a service which I did. Got confirmation for the 2nd February at 7am. Booked my car in, left it at the garage only to get a call a half an hour later saying ive got to come get my vehicle it cannot be serviced because its too early on the service plan for the service. I ASK YOU!!! couldn't they pick this up when the reservation was made? What a blatant disregard of my time!!! I live in Centurion and came in just for that reason, I even put in a days leave at work. I tried contacting management with absolutely no reply.