Amex Prepaid Card Complaint

Amex Prepaid card department,

General purpose card Unauthorized transactions/trans. issues California

I have an American Express Serve Prepaid Account, card number - and - sub-accounts. - of my sub-account holders is - -. The sub-account card for - - was lost and I promptly called the American Express Serve customer service number to report the card lost and also notify them of the unauthorized transactions found on the account online. There were - posted unauthorized transactions at the time of my call, from - different mechants, for the amount of $1700.00 and they were disputed. I was sent a dispute declaration form on Friday -/-/2015 which I filled out and sent back by fax, same day. To my surprise, I received an email from American Express, stating that my Serve account has been suspended, and all my sub-accounts closed. I also got an email saying my disputed transitions ' claim was denied and never got my money back. The case for unauthorized transactions was reported Friday, and by Monday morning, American Express has concluded their investigation and denied me fair hearing, as stipulated by the banking laws. I Calle the Merchants in question, and some of them never got a call or Email or mail from American Express, regarding my case. So the question is, what was investigated?