Sometimes those bags are just genetic and used for all kinds of teas. I guess that's what the vendor meant. I don't see why they wouldn't know what tea it is. It seems to me very likely a language problem instead of not knowing at all.
By looking at the dry tea, it's very hard to tell what it is. A lot of teas are made in this shape.
For example, this is a fo shou oolong
This is a ben shan oolong
This is a huang jin gui/golden osmanthus
To name just a few...
By seeing a photo of dry tea, it's very hard, if possible at all, to tell.