I have to agree that marking the return slip "defective" doesn't always work. I've had a few instances where I didn't get the full refund because whoever processed the return didn't pay attention to what I'd written.
In one recent case I'd even marked the item on the place where it was defective, so that they wouldn't put it back in regular stock. Didn't make any difference and I had to ask the moderators on these boards to sort it out.
Sometimes "stuff happens".
"" A little learning is a dangerous thing."-Alexander Pope