Blocked Account

I posted a second hand caravan on FB Market place. Then suddenly my Market Place account was blocked. They said I violated FB community standards..... I appealed 3 times and requested the reason as to how I violated the community standards. Every time a computer generated reply just said your appeal has been review and not accepted. With out any answer as to what I did wrong. Now the following message appears: You can't buy or sell on Facebook This is because you didn't follow our Community Standards. This has been the third review of your account, and this decision is final. This is really frustrating, but luckily I am not a big facebook user and there are far better platform to use. Just wondering.....Are there any humans working at Facebook?