Bad Brakes

I live in the Berkshires of Massachusetts. The terrain is hilly to say the least. From the first day of my new 2017 Highlander, the breaks would go wump wump wump down the hills. I notified 2 Toyota dealers of the problem 5 times. The end result was the 2 year free warranty cost me over $700 to fix the front or back warped rotors that weren't covered. Any one else have this problem?