I've had a whole series of infuriating calls from variations of this number. The moronic bottom feeders never leave a message, of course. Today the phone was close to me so I picked it up, pressed "speak" and listened. There was silence for several seconds and then a man with a foreign accent said "Hello? Hello?" (That's one way of identifying yourself and who you want to speak to!) He then demanded that I "speak up"! They call incessantly, drive innocent people mad in their own homes, never speak - and then have the gall to demand that you speak up!
I only hope that he was at least a fraction as furious as I've been - which was my sole intention.