I was disappointed in the catalytic converter and ...

I was disappointed in the catalytic converter and exhaust piping I ordered. It was poorly made and did not come close to fitting the car it was recommended for. I had to cut off the converter and have it welded to the original piping from the manifold. Then the $60 promotion card I was entitled to I did not get because the Tenneco company that was handling the promotion lost the bar code I sent with the paperwork. Tenneco insisted on a resubmission of the original bar code. How do you do that?! I think I have had my last purchase from RockAuto.