This collector seems to specialize in VERY old debt whether paid off or not. Uses many numbers beginning with  (551) 227- (I suppose to fool the unwary our circumvent the call blockers.

Read up on your rights here and also make a complaint at this government site:  http://www.consumerfinance.gov/

Also file a complaint with your State Attorney General's office.
List of State AG’s offices:   http://800notes.com/faq/attorney-general

Called and leave no message, annoying I'm adding it to the block calls