How do I get prior written permission to run an ad about skill based gaming?

My ads keep getting declined because my app allows people to play video games for money. They said I need to get prior written permission from facebook in order to run these ads but they dont leave a link where I contact them. Does anybody know how to go about this? Ive been trying to 3 days now and I cant find anybody to talk to about it.

Asked about 2 months ago