Brake work is relatively simple and requires no special expertise, especially for a car as old as yours. Old leaks require a lot more effort to diagnose. That's why they decided to hit you for an exhorbitantly priced brake job, I suppose. This is a typical strategy to bilk the customer: you tell him that you will fic his car. but it won't be cheap, blah, blah, but when you have paid, your car will be just like new. Then you go to pick it up and it is far from perfect, so you return it, and surprise! you get to pay even more!

You need to make them fix the brakes as promised, and never, never return.

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Semibodacious Transmogrifications a Specialty

1990 300D 2.5 Turbo sedan 171K (Rudolf)
1985 300D Turbo TD Wagon 219K (Remuda)

"Time flies like and arrow, yet fruit flies like a banana"
---Marx (Groucho)