Similar experience, closed ad account because of “suspicious activity”, at least ten support tickets (half closed automatically), four lame apologies (our system says no, sry) and then finally, “there was an error in our system, you’re good to go”
I lost it because there was some sort of UI bug in the ad preview page that led the page to reload a bunch of times really quick, and boom, I'm apparently a criminal. You're lucky though, I never got it back and I had to change my business credit card because they somehow kept charging me after suspension.
I have an option to email them, live chat, or have our account manager contact us. I guess if you spend enough on ads per month you are entitled to more support...?
They do, I have used it a couple of times. Go go facebook.com/business/help click on get started button at the bottom for "find answers or contact support". Follow through, you will see a button called "chat with a representative".