this collection agency keeps calling me and it is constant.  It is the wrong number as they ask for someone else. I keep telling them that it is the wrong number and they continue to call!

Debt collectors are notoriously deaf to verbal requests and denials. If you're not their intended target, you must tell them in writing. It's called a "cease-comm" for short, and it is best sent USPS Certified with a return card. Under federal law they must comply with your written notice.

Learn how to exercise your FDCPA rights as an alleged debtor at FTC-dot-gov.
http://www.ftc.gov/os/statutes/fdcpajump.shtm

312-854-1756 calls several times a day. Reported number and business to BBB.