Yes, using the information I have provided as well as where to report them you need to do this. Send them a certified, return receipt cease and desist calling letter. Make sure you report them to the proper agencies to which I have provided links. You also should consider suing them for FDCPA violations and any other violations your attorney could think up.
they've been calling from a different number for weeks. i finally had not heard from them for a couple of days. then got another call today. trying to scam, saying we had a bounced check from 18 years ago... people have been getting calls from them for a long time.