This son of a witch called me at my work asking for the owner of the merchant account (didn't know my boss' name). He pushed me for a time to call back and claimed there was no call back number. What kind of legitimate business doesn't have a call back number? He can try all he wants to call back. I will not answer again.
Grr... 'Merchant Services'
Their goal? Sell you a credit card reader that charges unbelievable fees.
So yes, they will experience Ye Olde Dragge und Dropp into the fax line if they should call again.