Wipe it off?

Hello together, Today I was at a workshop that also looked after the factory cars of my employer and is only a few 100 m away from the operation. It was about my GOLF V (1K1) 1.4 FSI, year 2004 Diagnosis: – front wheel hub must be replaced 260 ,- – brake disc back right must be replaced – 270 ,- (can you not make both together = 2 x material; 1 x assembly?) Then came another call: – brake pads/blocks back right must be replaced 370 ,- Total 900 But I’m only layman. So far I’ve had everything done by an acquaintance, who is however prevented in the long term. I asked a friend and let him tell me that it would be much cheaper in other workshops, or if an acquaintance does it. Workshop called. I was told it was already dismantled and the reassembly would of course cost. It’s my fault, of course, that I originally agreed directly and he workshop did, I only thought of about 100-150 €. Can’t have taken too long. I received the invoice for 296 € gross in the workshop. I only had laymen, but even with an hourly wage of 100 € one would have needed 2.5 hours. That screams for incompetence, usury or even both. The worst thing is, of course, that I could have avoided it, I would have said directly that the prices did not fit me. Basically, I would have even compared before. However, I never expected such amounts. My chance for a complaint is over, but I’m still interested in whether the amounts are justified. What are your experiences? PS: Please excuse me if I made any mistakes. The whole thing was only a few hours ago.