SoL and getting the calls to stop
I had a company call me about a some debt they claim I took out in 1996. Clearly, the SoL is way past. They can only tell me the creditor is Household Benefits, which I have never heard of. They offered me a settlement. I told them I have no idea what the debt is and they should provide me more information. They said if I wanted more information, it would count as disputing the debt (which I have no idea if it is legit of not and am willing to pay if I owe) and the settlement would no longer stand. This made no sense to me and sounded like a scam, so I did my homework.
I have told them that the SoL has expired and that they should stop calling. They noted that they could not sue me over this debt, but they could continue to call.
How do I get them to stop annoying me and how do I make sure this annoyance stay off my credit report?