National International Recover

Review: CLAIMING I HAVE BACK CHARGES FROM A CREDIT CARD. THEY KEEP CALLING WHEN I HAVE ALREADY HAD COMMUNICATION. TELLING THEM I DO NOT OWE THIS.THEY KEEP CALLING FROM DIFFERENT LOCATION. THEY NEED TO STOP. I NEED TO SEE THE CONTRACT AND DOCUMENTS THAT THEY SAY I OWE FOR. NO MATTER WHAT I SAY OR TRY TO DO THEY IGNORE THIS. THEY LEAVE MESSAGES THAT ARE UNCALLED FOR.I NEED THIS TO STOP. WHAT DO I DO?Desired Settlement: THIS SO CALLED COMPANY IS TO STOP CALLING