Attempting to trick me into acknowledging prescribed debit

I am being harassed by these people for an FNB card debt which prescribed well over 10 years or more ago. They phoned me today attempting to trick me into acknowledging this debt, which I obviously refused to do. I was previously harassed by Hammond Pole attorneys for this same amount, and now it seems this ************ bunch has taken over. How does one get these people to stop? Does FNB have any control over this, or are they even aware of it?