You can dispute purchases within a U.S. Bank ExtendPay® Plan the same way you dispute other credit card transactions.
More information
When you dispute a purchase that’s in a U.S. Bank ExtendPay Plan:
If the disputed transaction rebills for any reason:
If you made payments to your U.S. Bank ExtendPay Plan for the disputed transactions, they’ll be credited to your revolving balance. The next monthly statement will reflect the adjusted fixed payment amount.