Hello there.
You're looking for Facebook ads expert experienced with designing policy compliant ads.
I have experience working with a company going through a Facebook whitelisting project with the official Facebook reseller account agency Httpool Baltics.
We had the chance to work with Facebook's policy team, and have our ads evaluated for compliance.
At the start of the project, our ad accounts and business managers were constantly disabled. In the end, we were almost 100% compliant without disabled ad accounts.
To give you a clear answer to why your ads are disapproved, I'd have to see the ad campaigns (copy and creative) and the landing pages.
The reason why this ad was disapproved could be because of this line "guarantee a more attractive return than with the traditional 'Buy and rent' system." (I used google translate.)
I'd try launching this ad without the 'guarantee' because Facebook is very sensitive to any kind of guarantees (you'd have to have extensive proof on your landing page verified by third parties to guarantee such a claim.) If it gets approved, then it's the 'guarantee' part that.
I'd love to learn more about your business and show how I can help you be 100% compliant.
When you work with me, you'll get a quick turnaround, clear communications, and simple fixed rates.
If any of that is what you need, message me.
Kind regards,
Valters Voronovics.
P.S. Regardless of who you choose to go with, keep my info just in case. I'm standing by to help.