Has Anyone Dealt with Roquemore & Roquemore Inc. Debt Collection Harassment?

I've been dealing with persistent and aggressive debt collection attempts from Roquemore & Roquemore Inc., and it's becoming overwhelming. I want to know if anyone else has had similar experiences with this company. Have they violated any debt collection laws in your case? What steps have you taken to stop the harassment?

I found this resource that talks about consumer rights and how to fight back, but I'd love to hear from others who have been through this. Any advice or success stories?