XXXX was paid off last XXXX 2014, no bills OR notices have been received at this address. NOW 2 months ago we get calls at ALL hours of the day from multiple numbers, PLUS my married sister got them at her home., I got them at work.I have called them repeatedly and told them XXXX said is WAS THEIR error and that I owed nothing. Still calls and letters, first demanding {$6000.00} plus, then 3 payments or {$2000.00} plus now it 's {$2400.00} to settle debt that I do NOT owe. I have told them REPEATEDLY to straighten it out, THEY ARE RUDE AND OBNOXIOUS AND refuse TO LISTEN all they say is send the money. I have asked them to show me a bill from XXXX and all the sent was statement saying I owe {$6000.00} plus but NO idea where they got that figure. I have received NO BILL from XXXX for over a year about anything.