Not accommodating to new clients booking a service

Hello , so my experience at fiat centurion was bad because of how they handled my vehicles service, first off i was there early by the opening time to avoid having the vehicle collected early , it was my first time booking in a vehicle and i was unsure of the processes , the service advisor advised me that she would help me through all the processes, i asked her what time she thinks the vehicle would be finished and she said that 2pm would be my estimated time, which was perfect because i end highschool around 2pm , then 13:58 i recieved a sms stating that the vehicle is not yet finished , i was stranded at school because they did not confirm when i should be fetched , even though my drop off and pick up form was completed stating i should be fetched at 2 pm by my school , so i had to ask my brother to fetch me , we then arrived at the dealer to pick up the vehicle at 14:25 , when we met up with the service advisor she said that the vehicle would take another 45min , so we waited for the vehicle to be finished , a hour passed and so i asked to speak to the service manager to ask what is happening with the vehicle , when he called the workshop technician and service advisor over he asked them how late its going to be finished and the technician than said that it would be a another hour , i asked why this was not done earlier than the service manager said that there was not a requested time on the job card , which means that the service advisor did not write it on the jobcard when i dropped the vehicle off and so the vehicle was done late ... i will not recommend this workshop to anybody and i wont be coming back there again.