Here's the bottom line: Craigslist is free and the creator and the people who supposedly work there do NOT care about anything that goes on with the site. That is why they rely 100% on users to flag the ads. The individuals that flag the ads are mainly bitter and spiteful people. They do it because in their opinion they don't like it or you. I posted in the Flag Help Forum and every reason I received as to why my ad was flagged was nothing but a person's opinion. Not one person could tell me why according to the precious CL rules my ad was flagged and removed.
CL is a joke, but you get what you pay for.
It's obvious they don't care about the murders and rapes that have occurred as a result of their site, so why would they care if legitimate ads were deleted by users?
You can't reach them by any method invented. Don't expect anyone to call you back or to receive any other reply from an email except one that is canned and automatic.
Take your business elsewhere, is the best advice I can give you.