CHARLOTTE, NC (WBTV)- The Better Business Bureau has announced its ‘Dirty Dozen' list of area businesses with the most unanswered complaints in 2012. "This year, there are three businesses on the BBB's 2012 Dirty Dozen list that are what we call ‘repeat offenders' because they were on last year's list, too," said BBB President Tom Bartholomy, "One of these businesses...