No they won't because they (DCA and the bank who is the original creditor) confirmed in written letters and a recorded telephone conversation that the alleged debt is written off.
The terms they accepted in my F&F letter were: "This offer is made on the clear understanding that, if accepted, neither xxxx, xxxx, or any other associate company or debt collection group will take any other action to enforce or pursue this alleged debt in any way whatsoever and that I will be released from any liability."