I can understand how you're annoyed, I sent a late 40's Norton single cylinder engine to be re-built by the the UK's No1 Norton single cylinder specialist, when returned I discovered he had stamped his first name and first three letters of his surname into the left hand side case, just below the bottom of the pushrods, in plain sight for all too see, I was really surprised and shocked that someone would deface a motor like this, especially someone who should know better that knows the value of these engines, it seems there's no accounting for what someone's ego will justify. Luckily the case is quite thick, the stamping not too deep and I was able to polish it out.
The lack of label recess is pretty crap for a platter that's 'designed' to be used without a mat.
Fwiw it's a cheap, tacky looking platter anyway, the weights look crap, I'd much prefer a plain and simple black 26mm Delrin platter or perhaps one of Regas own 'upgrade' platters.
Btw, if you're not happy with a purchase and the seller is not answering emails or being awkward, etc, the best move is to post on their public profile in the social media platforms, FB or Instagram, this tends to get matters sorted out quickly.