Gas Station

I charged my debit card on the gas pump. Input the incorrect pin number and hit "CANCEL". The pump still allowed me to pump gas. I asked the attendant about it and she was not helpful at all when asked about it. She would not even tell me her managers name when asked (obviously an attendant wont be much help in a situation such as this). The fact she wasnt helpful in just telling me her managers name when I have an obvious case of what could have potentially been credit card fraud is UNACCEPTABLE.