Detroit Axle review: Terrible parts, worse customer service

I purchased brakes and rotors for my lincoln mkx. The order came quickly and i took the parts to my mechanic. My mechanic put the parts on and took the car for a test drive to make sure that everything was working the way that it was supposed to. During that test drive he found that the brakes and the rotors were not performing the way that they need to be. He told me that the parts are not safe and could cause dmange to the car. THe parts were tested, they were NOT used. It also states in the letter that he wrote that the parts were TESTED . Detroit axle stated that because they were used they could not be returned.
This is conversation after conversation. They had me reach out to my mechanic different times changing the letter that they said that they needed to refund my money.
At one time during a conversation they told me to '"go ahead and contact the state".

I told them that i would agree to half of my money back if they did not want to give it all back. They did not agree with that. They said that the letter that i send stated that my mechanic drove on the parts, the letter does not say that. It says that he TESTED the brakes and rotors. He did NOT drive on them.
They will not give me my money back, i do not have the parts because they had me send them back to inspect. I do not have the goods, the money and i am out weeks of time contact them.
They are thieves and a simple look online would show that this is their business practice.