Have to agree with Mark on this one.
I doubt Joma considers marks that aren't visible when worn as cosmetic issues worth mentioning, even on luxury watches.
I know you are pissed that you spent a lot on a piece that isn't pristine, and it's understandable, but they ARE a grey market dealer. I'd be wary that anything they sell is BNIB whether they claim it or not. They are discounted for a reason.
So IMO your best option is to buff the marks out if the sight of them bugs you that much seeing it everytime you take it off (it's not hard, honestly) or, change straps so frequently that the other 3 lugs match it. ;^)