Basically Balmer&Kalt are a drop shipper for watches from a make-believe 'luxury brand' that can be bought for a lot less on sites like bangood.com, etc. They will also add a substantial shipping charge to your already overpriced watch.
The Balmer&Kalt brand seems to attempt to ride along on the swiss brand Balmer. The actual Chinese manufacturer/brand is Megir.
They advertise on Instagram, eBay, Amazon and so on with 5* fake reviews and ridiculously marked down timed "Sale" prices that, if you try to get a refund for, are a kind of Catch-22 and are refused because they were on sale.