Customer experience gone bad

I booked my car in for service 25 June and took it in on 28 June 2025. The dealer was supposed to contact the administrator to get the authorisation for the work to be done so that when I take the car in all the necessary admin is sorted. None of that was done, the Power-up claims department doesn’t open on Saturdays, the car had to be serviced and I had to pay for the car to be released to me as they wouldn’t release it without payment. I called the service desk Monday, 30 June for that Job Card which isn’t in the file with the rest of the documents. I find this to be disingenuous especially because I assumed we were engaging in good faith now that the job card cant be found it is as if someone is absolving themselves of any responsibility and hiding the “evidence” when in-fact had they contacted the administrator and got the authorisation for the servicing all that could have been avoided.