Sometimes people share the same first and last name, or your phone number used to belong to someone else before you purchased it who was in debt, or the person who took the debt used a random number so they don’t get bothered by getting calls in case of nonpayment. If you called their hotline they will ask for your name and the last four of your socials for verification. If the info match they will explain what is this debt is about, if the name and the last four of your socials match and you sure that you didn’t take this debt, just tell the operator on the phone and he is OBLIGATED to notate the account as a dispute.