Hi WKL5645,
Welcome to Microsoft Community.
I'm Hahn and I'm here to help you with your concern.
I'm truly sorry to hear about the difficulties you've encountered with the warranty support for your Microsoft Ergonomic Bluetooth Mouse.
After your device is properly packaged and ready to be shipped, you can locate your shipping label in your email inbox. As a reminder, your email service may route this to your junk or spam folder.
I understand that you've tried some steps already, but it might be worth trying to reach out again, specifically mentioning your support ticket number and the urgency of your situation.
Because your question requires Personally Identifiable Information (PII) to be properly supported and this Microsoft Community is a public forum, please do not provide or use PII here in order to protect your privacy and security, thank you for your understanding.
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I hope this information is helpful, and I sincerely hope that your issue gets resolved promptly. If there's anything else I can assist you with, please let me know.
Your Sincerely
Hahn.W - MSFT | Microsoft Community Support Specialist