A Penny Stock sales company has got my fax number. I'd like to return the favor but they hide their return number. How do they say to get in touch with them? If they are selling something, I presume there must be some a way to contact them.
That's the whole thing about this fax. (And this is the third or fourth one.)
I can 'disconnect' (have my number removed from their automatic dialer) but how'd they get my number in the first place ?