HSBC Bank Account Or Service Complaint

HSBC Bank account or service department,

(CD) Certificate of deposit Deposits and withdrawals Washington

I have a 35 year old CD ( Issue date - -, 1980, initial deposit amount of $200.00 and 12 % a year ) and I need help accessing the funds. The CD is in my great grandfather and great grandmother 's name ( -. - or - - - ) and the issuing bank has been acquired multiple times in the last 35 years. The initial bank was -, according to the FDIC 's website, after a string of acquisitions, the current institution is HSBC Bank USA , National Association. Please contact me with the best possible action to take to get access to the funds. Thank you.