Credit card or prepaid card — U.S. BANCORP (MA)

Problem with rewards from credit card. When redeeming {$570.00} in points on my Fidelity Investments XXXX credit card, I accidentally hit the wrong key when I was online. I wanted to have the rewards dollars credited to my brokerage account at Fidelity but instead I hit another key that said statement credit which resulted in a XXXX % reduction to XXXX which was credited against my credit card balance. The result was a loss of {$280.00} to me. I immediately called Fidelity ( like 10 minutes after I made the mistake ) and was transferred to Elan Financial which handles the cards for Fidelity. I talked to 3 people at Elan, all said nothing could be done. I recently got a letter from XXXX services that said nothing could be done. I believe Elan is owned by US Bank. I feel that this is