For this kind of issues no one but the guy from Coinbase can help you out (you can find him around in this forum). Just send him a message to see if he can help.
Certainly I have sent them an e-mail which is the only mode of support that I can see. It is only reasonable to allow at least a day for a response, and that period of time has not yet elapsed.
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I have sent them 3 emails total since I've been with them. The response time has always been between 1 and 2 weeks. Very slow, but at least it exists.
This reminds me that I should have done an update.
They got back to me within a few days. They agreed that the mail they sent about the status of my level-1 achievement was premature and apologized.
I personally am satisfied with the interactions I've had with them, but I've had pretty good luck. Like everyone, I want immediate results if I can get them. I'm inclined to cut them some slack at this point. Start-ups tend to have limited resources to fill many demands in my experience with them (both within and without.) I do hope that they are making good use of the feedback that they can get to factor into decisions about where they focus their efforts.