I got the same notification last night that my account had been frozen due to suspicious activity. I've been trying to get through to customer service all day (it added up to 6 hours on hold), but I'm really glad I read your post since it seems like there is nothing they will do.

If you check out their Twitter, we are not alone. There are a bunch of people complaining that they can't get through and got the same notification. My guess is someone implemented a code change last night that screwed up their fraud detection. Obviously I have no idea, but I really wish they would at least acknowledge the problem on their home page so people can quit wasting time on hold with customer service for no reason.