Burritt Chrysler Dodge Jeep Ram

I purchased a vehicle (Jeep) I said something bout the brakes they took a look I drove it again they sounded finally ... after I drove it on highway over 50-60mph I felt a vibration when stopping called dealer back he told me to drive it for awhile it will go away come to find out my back brakes were literally worn down n I had to change them and rotors .... I shouldn’t have to change my brakes and rotors, 3 months after buying basically new vehicle and on top of that I had to buy new tires cause dealer told me he can sell them at 40% tread.....all I’m saying is 40% Tread don’t help when winter right around corner ... More mad about having to fix my brakes after I’ve called and complained and was just told to drive it will go away ....!!!