For what its worth I hope you manage to push through.
I think that Google is wasting huge ammounts of goodwil through its lame operation of GAB.
One does not simply not run a customer service.
Edit: To add a bit more substance to this comment. I kinda know wahat you are going through. I took it upon myself (after numerous have failed) to push through something that looked like a pretty nasty bug in Lotus Domino 8 server and client. Basically what I found out during research is 20% of IBM 852 (its internal datatype) was simply corrupt.
And boy for the longest time nobody responded. There were IBM SWAT Team Leaders guarding the sacred Process that would insist on telling me that there is no Bugs in their platform and that it is obviously my fault. It took six months, an extremely detailed testing procedure with test cases and invoking a lot of connections to get my report infront of a person that could actually understand what is going on.
Soon after that I received a hotfix. I had to repeat the whole procedure another two times. And by the third time I could get it done in three months. I basically made the blue elephant dance just for me.
So for what its worth my advice is to invoke every and all connections within Google not to just get your issues within an internal Google issue tracker. You need to find out (from the outside) who is the guy responsible for the general area that is causing you problems, then keep in touch with this person and after some time you will get your fix(es).