Wells Fargo & Company Bank Account Or Service Complaint

Wells Fargo & Company Bank account or service department,

Other bank product/service Account opening, closing, or management Texas

Wells Fargo claims I opened up a line of credit with their bank for $1000.00. I have requested a copy of the proof as to when I signed for that account to be opened. They have refused and have continuously attempted to collect an outstanding amount of $400.00. They have reported this account as delinquent to all - credit bureaus. I need you to assist in helping me identify if this is something I did open and if they can show proof I agreed to open.