I haven't had a debit card, ever. Credit union sent me one once and I exchanged it for an ATM card. Debit cards have none of the protection of credit cards.
However,
Why would you get a card from a bank you've never heard of if you don't have an account there? Was it tied to some sort of loan? I get junk mail all the time with phony cards in it but just toss 'em. I'm sure blind solicitations get less than a one percent response. Why did you call them?