Amex Bank Account Or Service Complaint

Amex Bank account or service department,

Other bank product/service Deposits and withdrawals California

Re : Case # - So is the result that my - options are to either sue American Express Centurion Bank in small claims court or allow them to keep $1400.00 of my money that they have admitted that they received custody of in my behalf? And you have no authority nor can refer me to an authority for assistance with my issue?