HSBC Bank Account Or Service Complaint

HSBC Bank account or service department,

Other bank product/service Account opening, closing, or management New York

My wife and co-borrower, wrote a check against our home equity line of credit to pay a credit card. HSBC returned the check unpaid and indicated that she was an unauthorized borrower. After calling HSBC customer service twice, they then said that the signatures did not match. I then ask them to provide proof by requesting a copy of the returned check and the signature card but HSBC had the audacity to charge me a fee for this. I can not believe that they want to charge me a fee for their mistake. I have since been charged $30.00 by HSBC for a returned check fee. My credit card company also charged me $30.00 for a returned check fee and almost $15.00 in interest for the period between the due date and the date I paid with another check. It is unacceptable for a bank to be unwilling to provide a copy of your own signature to verify that they have a correct signature on file. I also requested that they mail me new signature cards - which they have failed to do.