Support packages are available. http://googleenterprise.blogspot.com/2013/02/google-cloud-pl...
For example, this guy was a paying Google customer but couldn't get help http://www.sultansolutions.com/google-voice-lost-number/
These are paying customers who are paying a non-trivial amount of money for support (though not the "Premium" support in this case, which is an extra $500 per month for GAE).
In this case, Google's response is seemingly "It might (or might not) be a system-wide issue, but we don't care - we won't fix it".
There's no indication in this case that someone paying $500 a month for the premium support would get a better answer.