Yea, only by filing a quota increase request <https://support.google.com/cloud/contact/gae_quota_increase?hl=en>can a quota be increased, as it is sent to the only team that handles quotas. Sales may have been able to route your case to the quota team, like-wise for the support phone call you made, but the most direct and correct route to the team is via the form.
I checked and found your quota request and I went ahead and notified the agent who is handling it of this groups thread in order to emphasize its importance as a one-off courtesy. I also see that it has already been escalated to the engineering team to investigate increasing your dispatch rules, so lets hope they can do this for you. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/8e9b187a-451f-4344-8eee-b77dc96eeaba%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
