You haven't won anything-it's a scam. The scammer will ask for a large personal check for "processing fees", giving him access to your bank information, and make you wait for your "prize" while asking for more and more money. When he finally sends the check, it looks real but is actually worthless, and you can get in big trouble with your bank for trying to cash it, including being fined.
The scammer might also have the technology to steal your personal information from your cellphone with just your phone number or your email address, so you're better off not responding to these ads at all.
Hope I was able to reach you before you got taken advantage of.