I can confirm that Soban is a representative of a Turkish Carpet import firm. They typically get your name while you are in Turkey visiting carpet shops. We have purchased two carpets from them, in the states, when he visited an associate who had visited the shop in Istanbul, and they are authentic.
They call to set up an appointment, and bring a van full of ranges of Turkish carpets, from prayer rugs through big silk carpets.
Ammie is correct, just call block them if you are not interested.