I got 2 of those stupid things in the mail. Read the back of the card and figured it was a waste of my time.

Phone rang twice, than hung up

Called, they set up an appointment and then refused to bring the prize when my wife wasn't home to sit through the sales pitch.

Called several days in a row at different times of the day

I received a "Triple Bingo" scratch card in the mail and on the back of the card, it says "If you match one of the "Winning" Bingo Combinations as shown above, please call the Contest Hotline immediately" with the following number "(905) 688-9679". We had won on one of the Winning Bingo Combinations and called the hotline to claim our prize. When we called a female answered and asked if we were students, which we are. She then replied that students are not eligible to win. We read the contest rules at the bottom, where it said nothing about needing to be a home owner or that it doesn't apply to students. We called back, I was put on hold for two minutes, and when the lady answered again she was extremely rude, did not let me finish my question, interrupted, told me students didn't apply, and when I tried to ask her why it was put in a mailbox of a building full of students she told me it only applies to home owners and HUNG UP ON ME.

Called several times and hung up.  never left message.