The standard review time for ads can take up to 24 hours. For ads that have been in review for longer than 24 hours, we have an article outlining options on what to do here.
Facebook has an article for troubleshooting a disabled ad account here. This article from Social Media Examiner may provide a useful reference for options.
We are not able to provide legal advice on this topic. GDPR has different potential implications for different organizations, depending on the way the organization may be utilizing data for advertising measurement and optimization. Facebook has a dedicated GDPR microsite available here.
Facebook previously had an official policy that ads with more than 20% text in the image could not run on the platform. While this “no more than 20% text policy” is no longer in place, Facebook generally recommends avoiding high levels of text.
Recommended specs/dimensions are available in Facebook’s Help Center here.