So I had Nissan put new front break pads on because it was time (after only 30k miles) and ever since they won't stop squeaking when I come to slow stop. I brought the car back 3 times and all they do is put break lube on which wears off after a week. On the fouth time they had the nerve to tell me it was the back brakes that are squeaking. Really don't know what to do they already got me for 200.00 so I feel like i have no choice but to keep bringing it back to them till they get it right. Any suggestions?