Transmission Fluid Leaks

What is your question?

I just came back from MB dealer(they performed transmission fluid service and service B) and they noted in the Vehicle Inspection report that car has transmission fluid leak. The problem is that nobody notify me for this problem from their service department. I will call back on Monday to verify. I do not know why they did not fixed this issue when they serviced automatic transmission (should be a serious problem).How much will cost me this repair? Thanks Thanks