does cease and desist letter transfer with payment?

a LOOONNGG time ago I had a debt with a credit card. Its past the statute of limitations. I wrote the company a cease and desist letter when they had the credit card. They never called me. I never even got any calls from any collection agencies. However, now a laywer is trying to call me about this on my cell phone. I don't want to deal with them. They can't do anything. Do I have to write another cease and desist letter or are they violating the first one?