555 Diet Challenge unauthorized, fraud Internet

My husband and I were checking our bank account statement online, when we noticed a pending charge from 555 Diet Challenge. Neither of us had heard or signed up for anything from them. We called our bank, cancelled the debit card that the charge had been charged to and filed a dispute. We do not know how they got our information. My card was the one I use and I do use the card online to make purchases and I do believe that all the sites I visit are secured.

Rebecca c
Auburn, Georgia
U.S.A.