what kind of financial technology services are you advertising?
Facebook has very strict advertising policies and some of them are also about financial services. Here is a link in which you can read more about the policies related to the financial services: https://m.facebook.com/policies/ads/prohibited_content/prohibited_financial_products_and_services
Even though you don’t offer any of the mentioned services, Facebook might find your ads as not complying with the policies because you might use some words such as (financial, loan, bank account and else), or you ad images might include something what FB recognizes as againts their rules.
The ads are controlled by robots, so it’s not manual and the robots decide if the ads comply with the policies or not.