atcomsystems.ca/forum Forums General General Telephone & Systems Information Questions about telemarketers and bill collectors.

this is from the FTC web page (https://www.ftc.gov/bcp/edu/pubs/consumer/credit/cre18.shtm) and may help:

Where do I report a debt collector for an alleged violation?
Report any problems you have with a debt collector to your state Attorney General’s office (www.naag.org) and the Federal Trade Commission (www.ftc.gov). Many states have their own debt collection laws that are different from the federal Fair Debt Collection Practices Act. Your Attorney General’s office can help you determine your rights under your state’s law.

It also says that you can send a registed letter (with receipt of delivery) to the collection agency asking them not contact you further.