BANNED from Facebook due to ?

FACEBOOK question: I am not a heavy user of Facebook. I never discuss anything controversial . I never use provocative or off color language. I never post any photo that might be considered objectionable. Yet, for some reason they ban me and do not tell me why. I try again months later and  am able to get onto the site. then days or weeks later I get banned again. I cannot think of any reason whatsoever why this might be happening. I am an open book and would supply any information they might want about me to straighten out whatever problem they think exists. Is it possible to actually speak to someone at Facebook to get to the bottom of this problem? If not, can you please suggest how I might solve this problem? I just need some guidance to solve this recurring problem once and forever.