Santander Bank US Bank Account Or Service Complaint

Santander Bank US Bank account or service department,

Checking account Using a debit or ATM card Pennsylvania

I discovered - -/-/16 that a charge of $850.00 was charged to my Debit Account. I contacted Santander immediately while the charge was still pending. They told me then that there was nothing that they could do while it was still pending however they overdraft my account. The next day I call and they said they could not return my money for 10 plus business days, even though I had notified them when the charge was still pending. I have not charged over $250.00 to this account and the charge for $850.00 was made in - and I live in -. I strongly question if they have a fraud department because this charge would have been a red flag for most.