According to Google's policy, you are not allowed to advertise gambling or related content in countries with restrictions. If you meet the requirements, register to obtain Google's certification. You can either target the locations for which you've obtained certification or reapply for a new country. If you don't meet the requirements, target a location where advertising is accepted or modify the destination page to comply with Google's policies. You can change the final URL to redirect to a different page, website, or app that does not violate policies. Remove black hat content from your ads.