Covert Cadillac

I bought my Used Honda from Covert back in late October. My husband and I were very happy with the service we got, and i love my car. However not but 5 months later my car started making a grinding metal noise. So i took my car in to get serviced at Honda (Because thats what the covert service depart recommended when i called them about it) I was thinking the wheel baring was going out and it was just that time to get my car worked on. However Honda told me that it was not a wheel baring, infact it was my back braking system. They said my back brakes were metal on metal and the rotors were in bad shape too. I was quite surprised considering when i bought the car my back brakes were supposed to be at 5mm and my front were at 7mm. (front brakes are now at 3mm) They said it was very strange that if that was the case, that my back brakes could ware down faster then my front. So fast that my rotors were messed up. Basically i would of had to have been driving around with my Emergency brake on for the last 5 months to achieve that. So whoever did the report on the back brakes either lied or made a mistake, because they could not have been more then 1 or 2 mm when i bought it. (in which case they should have been changed) I called Covert, and talked to 3 people. The service manager did admit that that was not normal for the back brakes to do that, but that it was out of his control to make a call on weather i could be reimbursed for the expense. So then i talked to the used car sales manager and he was completely rude to me, and on top of that didnt know a thing about cars. He said me driving 11,000 miles in my car would ware down my back brakes. Even though the front brakes of a car are what you use!!! 11,000 miles on a car would NEVER ware down brakes that were 5mm all the way down until my rotors were toast, while the front brakes are still just fine. From there i talked to the general manager who was nice, but also didnt know anything about cars (and admitted it). So they refused to pay for something that was so outright their fault. I would NEVER buy another car from them again. Its sad, because my husband is in the market for a new work truck (which he drives all over the US and has never had to do back brakes in 4 years, and this is a 4 door long bed diesel 2500!!!) we are going to avoid covert like the plague they are from now on and so is my family who cannot believe what happen. I will however go back to Honda who was wonderful and even paid for my rental car when they didnt have to. Excellent service at Honda!