Toyota services

Booked for a service via the app more than 5 days in advance. I requested additional work to be done as the app gives those additional maintenance part's to be changed with price's. Quote was made and I know the amount that I was going to pay. Vehicle was there for more than 6 hours for service then I am told just before I can be invoiced that they don't have the additional parts that is needed. The service adviser first told me its not on the job then I had to read for him and show that it was on the job card. Then I was told it will take 3 days for the parts to come (this is gear box oil by the way) something that a dealership should have on hand at all times its not a special part. Now the vehicle is booked for the oil and the price isn't the same as quoted ? I battled to get a answer for why it costs so much more than quoted from the dealership but failed. I told the service adviser than I will contact Toyota SA to get more information on this and he's response was like no problem I don't care. I also battled to get a hold of Toyota Sa. I am waiting for Toyota sa to respond. We are paying money for service if they can't give us the service that we are paying for no problem we can take our business somewhere else.