Hunter Warfield, Inc. Debt Collection Complaint

Hunter Warfield, Inc. Debt collection department,

I do not know Cont'd attempts collect debt not owed Debt is not mine Texas

The collection company is continually calling my home for a debt that belongs to my son after I informed them that my son died this year -/-/-. My son was only - in - when he passed away suddenly. He had just turned - in - of -. What type of contract could they have with a minor child that allows them to call my house when my son died before he became an adult? They told me I have to send them a death certificate before they will stop calling my phone. My son does n't live anymore.