I recently called my credit card provider in the UK to query why I was being billed for a month when I had paid off the balance in full the previous month and not spent anything on the card in the interim (it was something to do with some scam the credit card companies pull by charging you interest on cash balances differently from anything else). The drone on the phone refused to admit fault, but reversed the interest charge of 76p in a show of goodwill anyway.
I just checked my phone bill, and that call cost me $2.79.
But the important thing is that I WON. OK?