This happened to me not long ago. This is what they do when reviewing your account (that's what it was in my case). After a couple of days I logged into my account and everything was back to normal. Only info I got from the big G was it was under review.

It could be a random thing with them, who knows. Like WhiskerBiscuit said you won't
get much help, if any from them. Hopefully it's nothing and you'll be back in business in
a couple of days.