national magazine exchange tried to charge my debit card fairview, Oregon

This would be the third time that national magazine exchange had sent me a letter to enter their sweepstake.  The first time i entered their sweepstake they said i would only have to pay like $6.00 a month and then the following month they tried to triple the payment and that's when i stopped making payments. I just received the third letter asking me to enter their sweepstake but this time they actually tried to charge my visa debit card.  i got lucky because i have a prepaid visa debit card and their was no money on the card.  So i called my organization to report my card stolen so they would not try to charge me again.  They say you are supposed to get a free pair of man n women's watch's that's not true  either and this recent time also offered a personal organizer.  If you ever get one of these letters don't fall for the magazine subscriptions and hang up after they start talking about the watch's and magazines.  thank you