Despite the Raffall.com domain being approved and whitelisted by Facebook, in order to run paid ads that direct traffic to your competition landing page, Meta now requires you to complete the Online Gambling & Gaming Advertising - Application Form below.
https://www.facebook.com/help/contact/656875985737607
The alternative option - Boosting a post!
If you have an urgent campaign and wish to promote your competition without having to get your Ad Account approved, you can try creating a post and adding the link to the competition in the comments section of the post, and then boosting the post with paid ads.