if convinced MTR are not correct certainly contact Samsung, however case is helped if you have photographic evidence.
Aware that some customers have experienced frustrations with the trade in, however other members do not have issues. When I traded in it was a smooth process and I received the value I expected.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 5.0,Android 13 .
@jimsouthstand: If you have any concerns about the inspection of your Existing Device, or wish to discuss the result of this inspection, please contact MTR on 0333 207 9676 or firstname.lastname@example.org