Bad service!

Firstly, I dropped my car at 07h30 only to be told at 15h30 that I needed to replace the disk and brake pads (they have even done 5k km) at a suspiciously high price. Secondly, there was no technical explanation from anyone about the problem, only the front lady who gave me the price. Thirdly, I took the car to four other service centres, including the original brand; they ALL disputed that I needed to replace the disc and brake pads. I am not happy with the service from what I think is a great business (at least from reviews that made me go to them).