IF the bright minded want to call they should give a detailed msg of what they want. Otherwise don't expect a call in return!
OFCOURSE IT IS NEVER A GOOD IDEA TO SPEAK TO A DEBT COLLECTOR!!!!!!
They can't do what they want you to believe they can do. Familiarize yourself with the Fair Debt Collection Practices Act for more info: http://www.ftc.gov/bcp/edu/pubs/consumer/credit/cre18.shtm
YOU HAVE RIGHTS AND YOU NEED TO KNOW WHAT THEY ARE!