Based off your facts it is important that you consult with a Consumer Protection attorney immediately. It appears that the debt collector may have violated both federal and state collection laws but more information is needed.
Most Consumer Protection attorneys do not charge anything for an initial consultation. As a matter of fact they usually do not charge anything for the entire representation since the statutes governing this area of law allow for fee shifting, so if the case is settled or you go to trial and win then the Defendant would be required to compensate you and pay all of your attorney fees. To find an excellent consumer attorney near you go to naca.net
If you have any other questions or concerns then check out my website.
If you feel the debt collector has violated the law, you should consult with an attorney that handles consumer lawsuits for violations of the Fair Debt Collection Practices Act and the California Rosenthal Act. Both Acts are meant to protect consumers from illegal debt collection. I am not sure from your inquiry whether they have violated the law, but most attorneys in this practice area will provide a free consultation to review the facts and determine whether they believe you have a good suit against the debt collector.
This reply does not constitute legal advice or the establishment of an attorney client relationship.
You should visit with a qualified consumer attorney in your area. You can search on Avvo or search the NACA website. There are fantastic lawyers in your area and most won't charge you to see if you have a case. Good luck and don't let collectors treat you poorly.