BMO Harris Bank Account Or Service Complaint

BMO Harris Bank account or service department,

Checking account Using a debit or ATM card California

My debit card was charged without authorization from - - - in -, NM. I submitted a fraud dispute with BMO Harris bank and received a provisional credit for a partial amount. The provisional credit was then reversed from my account with no warning or proof from the merchant that fraudulently charged my card in the first place for the amount of $1100.00.