It doesnt matter how a debit card is used, the card number is the same and goes to your money not the banks. The Visa link on debit cards is only there to give it access to purchasing at stores etc. since the Visa system is already in place. No matter how you use it, its not a credit card it subtracts straight from your money.It wasn't used as a debit card. Used as a credit card. In fact I have never used that card as a debit card.
Side note: banks will respond quicker to fraud claims when the money is theirs.
I know several are commenting on this already just trying to add to the why not to use it. Ive stopped using mine altogether.