U.S. Bancorp Prepaid Card Complaint

U.S. Bancorp Prepaid card department,

Gift or merchant card Unauthorized transactions/trans. issues Texas

I bought couple of prepaid cards at - in -, T- around -/-/2015. When I checked the balance couple of days later I found unauthorized charges on these cards. Someone had called and registered those cards in their name and made few online purchases. I called issuing bank on -/-/2015, they said they will send an affidavit for me sign so they can start investigation. I was told the affidavit would arrive in - days, but it never came. I called again on -/-/-, they took a fresh complaint and said the affidavit would arrive in - days. Again no affidavit. I called again and again and again ... .. Finally affidavit arrived on -/-/-!. I filled and faxed it the same day. No response from them so far. My funds are stuck for - days. BTW, the issuing bank is U.S. Bank and the card type is Master Card ( Gold colored ). This is what they told me : certain prepaid gift cards in similar situations would first refund the money to the consumer and then they do their investigation, but not with this card. So, stay away from these type of cards ( US Bank National Association issued Master Card gold colored prepaid card ).