Denied front rotor replacements b/c i declined $600 additional bearings work...

What im confused and mad about is they completed the rear services, completed half of the front services, and got $755 for it. Gave me a quote of the front rotor parts for 150, no labor, and then all of a sudden bring up Another 600 service and refuse to continue if i dont get that service.

I understand that the part may be needed but would it really be 600 more added? And plus would t they have known that bearrings will be needed? I think the person didnt realize how much work it was going to be before they actually started on my car. On the first day they said my car would be done in 3 hrs (pads,rotors,arm with ball joint, n alignment). But Ive brought my car three days in a row to that place and only on the first day was work done. The second day they supposedly couldnt get to it. And the last day they wouldnt continue unless i added the 600 bearrings. On the first day i believe they had to call other people for tools and such and on top of that the front desk guy gave me a low quote, which possibly meant that they didnt realize my rotors were the press on ones. And on all three says they would bit give me a time on completion. They would only say my car needed 3 1/2 - 5 hrs to complete and will notify me. I did not get any documentations from them on the second and third day my car was there which makes me wonder if they broke something on the first day cuz they kept calling people and some people came with a bag full of tools and such. How would/could i have someone inspect the work done on my car? And how would i know if it was damaged due to wear n tear or if it by people who incorrectly fixed them?