You would be better off by following the steps in what you need to know.  Send them a cease & desist via certified or return receipt us mail.  It may also be time for you to seek a FDCPA/TCPA attorney ..  Do not let this continue.

http://800notes.com/arts/Jb8EW-eDhQA/harassin ... ou-need-to-know
See Residents post here also:
http://800notes.com/forum/ta-34af6a034ba34b6/unending-collection-calls
Templates of Letters:
http://800notes.com/Phone.aspx/1-319-242-7350

http://www.ftc.gov/os/statutes/fdcpajump.shtm
http://www.consumerfinance.gov/askcfpb/search ...
http://www.consumer.ftc.gov/articles/pdf-0096-fair-credit-reporting-act.pdf
http://www.consumer.ftc.gov/articles/0149-debt-collection

To File complaints FDCPA/TCPA violations:
Your State Attorney General
Their State Attorney general
https://www.ftccomplaintassistant.gov/#&panel1-1
http://www.consumerfinance.gov/complaint/