Rich…let’s break it down….it’s the cat that can be skinned few different ways…
From the pure sale standpoint, the item was as described? Not misrepresented? Complete with everything that was listed in the classified? Seller came thru, shipped it on time? Everything is working fine, correct?
On this basis alone, I’d say the seller deserves a Positive rating feedback on US Audio Mart.
Now let’s account for the user error (not being familiar with the unit, non-descriptive manual, whatever the reasons may be). To be fair, there was a user error.
Now, in that feedback you can mention less than desired post sale support. That is technically a reason to downgrade it to Neutral rating, but I probably wouldn’t do it.
I’d leave a Positive feedback on USAM, expecting the same to be left for me, and express my dissatisfaction with post sale support, attitude, what have you, thru an email. Best thing to do is working this out in email first, civilly, then exchange feedback.
I’ll let others weigh in if you need additional thoughts, but this is just how I would tackle it.