Clearly either have had some sort of pugilistic damage to the pumpkin on their neck and are thus incapable of using an answering machine. Which usually means 1 of 2 possibilities. A knuckle dragging courier service operative, or the lower life form, of similar non compus mentasness, a stinking filthy foreign call centre scammer, not unlike the festering sheds our major ISPS exploit 1st world slaves within. Either possibility deserves an incurable case of highly visible herpes so we can know who they are should we suffer the misfortune of venturing near their nests.
Message to the scum >
Leave (a) a message or (b) me alone