Yes, I used a credit card to pay for this rental. What should I ask the bank that issued the credit card?
EhBeth is right.... you might have some level of car rental insurance as a benefit of the card. If you do, they will definitely make sure that the charges aren't too high because they will be paying them.
But even if you don't have car rental insurance, credit card companies are all bending over backwards to provide customer service. They might still help you simply to earn your loyalty as a customer.
Either way, I would call their customer service and ask for their advice.