Repeated calls

They claim I won a prize worth $400-$500. In their defense I did fill out an entry form to win a new car, but I've been getting lots of BS telemarketing calls like this since then. I blocked their number but they're still able to leave me lots of voicemails. I don't think they've figured out that I'm not interested in sitting through a time share presentation and deal with high pressure sales people so I can claim a free vacation with lots of terms and conditions

I stupidly filled out an entry to win a $100 gift card to Total Wine at a race expo. Now this lame company won't stop calling and trying to sell me a timeshare. As soon as I block one number, they call back on another.