Doesn't surprise me that someone associated with Xiaomi would do that.
Blatant thievery and lying is deeply imbedded in Xiaomi culture. I distinctly remember about two years ago how they blatantly ripped off everything Apple (the look of their phones, their packaging, their website was spitting copy of Apple ... it was truly sickening and repulsive how they denied it too ... any moron could see what they were doing). Even if they've changed now, those very steps they took made them the success they are today, so I see the whole company being built on lies and theft. It really turned me off to their products and permanently damaged their brand for me.
I don't know who this seller is, but if you sleep with fleas ...