I made a payment of {$100.00} on my credit card. I had a promo balance of {$4600.00} with 0 % interest. I made a purchase for {$25.00} on XXXX. I made XXXX payment that should have covered the balances of the the {$25.00} charge. Payment dates were XXXX for {$25.00} and XXXX for {$100.00}. I minimum payment was {$67.00} that month. I was charged a minimum interest fee of {$.00} on a balance of {$.00}. I think that charge is unfair and they refuse to refund me the {$.00}. 
