So did they make you keep it? Did you complain to your CC company? Sounds like bullshit, on the other hand a ton of people buy use wear damage and try to return... Seems like they receive from stores and don't examine, but only examine once it is returned.
Also what constitutes an "odor"? Some cheap cologne? Musk, Mildew, etc? Seems very arbitrary some stuff smells pretty bad from the factory after treatments and processes.