U.S. Bancorp Bank Account Or Service Complaint

U.S. Bancorp Bank account or service department,

Checking account Using a debit or ATM card California

On - -, 2015 I went to the ATM machine to withdraw $500.00 and the machine never dispensed the money but after checking my balance it showed it has been taking out. I called the bank and they said that give it one day and my account will adjust it self but that never happened so I called them and was advised I needed to file a ATM dispute and it can take up to 10 days for them to investigate it and after 2 business days I called to follow up and was told my claim was denied. I told them that nothing came out and it ca n't be denied and the rep asked if I wanted to resubmit my claim, I told her yes I do. After 10 days they told me the claim was again denied and the ATM balanced. Iam not out of $500.00 due to there ATM machine malfunction. I need help please.