They may have blacklisted your name because you're spamming them with applications. "I've left her 15 messages and haven't gotten a single response," sounds just about as crazy...
And I’d be really disappointed if all the submissions just went into the same person’s inbox. Somebody at Google should speak up if that’s the case. The way I expect Google to run, each submission just goes to that division’s hiring staff, and Google has a lot of divisions.