My account was banned from FB ads for unknown reasons, and when I was finally able to reach a person they could not shed the slightest bit of light on it, for a

My account was banned from FB ads for unknown reasons, and when I was finally able to reach a person they could not shed the slightest bit of light on it, for an ad that FB, themselves, generated and said “here’s some free ad credits, would you like to try it?” and I agreed … so I’m at a complete loss as to how these ads and many many others get through.