It may be fine in 1 or 2 days, just have patience
Hey there. I was a victim of the same ban many times last year. Sometimes Facebook didn't even notify me about the ban and just did it. I think the ban was the result of the links that I was sharing on my page (they weren't inappropriate by any means so I don't know why). Once I stopped sharing links from a particular website and changed it to another website, I haven't encountered the ban.its the 5th time in 4 Months..