Circle K

I pulled up to the circle k pump 5 ran my debit card as debit entered my pen number the pump would not turn on and start pumping fuel then I canceled transaction backed up to pump 7 then the pump now I'm at ran my card as debit again it says see attendant I go inside and the sales associate never asked me credit or debit I'm absolutely sure on this and I even chose debit entered my pen number and it declines my card I was like what the hell? And tried several times more before walking out to check my card and I found out the entire amount on my card that was left 42 dollars and something change was removed when I asked the sales associate and showed them the transaction they said there is no transaction pending and I need to contact my bank? Excuse me contact my bank? What and report a fraudulent charge sit at this pump for 7 to 10 business days ignore my life for a week and as well as block the pump?