How do I escalate an issue with Zapier customer service that has not been resolved after 72-96 hours?

I'm really sorry to hear about the frustration this situation has caused. I understand how important it is for your workflows to run smoothly and for your support requests to be addressed promptly. While I understand that the delay in our response has been challenging, I assure you that we're committed to resolving your issue as quickly as possible. I understand you'd like to speak to a manager. At Zapier, all Support Specialists speak for the company and everyone on our team is empowered to do anything for you that a traditional manager could do.
 
We understand that there are times when users may temporarily see a spike in usage (like when Zaps trigger unexpectedly). As a one-time courtesy, I've added 15,000 additional tasks to your account until your Task Usage resets. That way, you'll be covered through the rest of this billing period. After that, you'll return to normal task limits. If you were to hit your task limit again, you'll want to upgrade to a plan that can support the number of tasks you need. You can do that any time from this page: https://zapier.com/app/settings/billing
 
I'd recommend keeping the Zaps off that triggered unexpectedly until we're able to identify the root of the unexpected triggers. It looks like a few separate issues are happening here: 
 
Mailchimp error
 
First, sometimes the Mailchimp step in your Zaps is returning the error:
 
Mailchimp ran into an error: Too Many Requests - You have exceeded the limit of 10 simultaneous connections.
 
Here's a recent example:
 
I did some digging and found this is a bug with the Mailchimp app on our platform. Specifically, we see this error if we're sending too many requests to Mailchimp at the same time. We're aware of the issue and actively working to resolve it. You've been added to our list of affected users, and we'll be sure to keep you updated via email as progress is made. Replaying any of the runs that were stopped manually should succeed. Here's a guide on how to replay Zap runs: https://zapier.com/help/manage/history/replay-failed-zap-runs#manually-replay-failed-zap-runs
 
Another user let us know there were able to resolve this by disconnecting Zapier from Mailchimp on Mailchimp's interface and reconnecting their Mailchimp app connection to Zapier. You can reconnect your Mailchimp account to Zapier here: https://zapier.com/app/connections/mailchimp

Zaps unexpectedly triggering
 
Second, Zaps are unexpectedly triggering on your account. Typically when a Zap using an Updated Record trigger runs for a large volume of records around the same, it's because a bulk update was made in the trigger app. Were you able to find if there was a bulk update made to the records in the Mailchimp Zapier Integration object of your Salesforce account? 
 
Again, I apologize for the inconvenience this has caused, and I thank you for your patience as we work to resolve your issue.