Hi Pizza,
There are some tips for locating your Meraki Order number in the following Meraki resource:
https://documentation.meraki.com/General_Administration/Inventory_and_Devices/How_to_Locate_your_Mer...
The Meraki Order number is a 9-digit alphanumeric that will most likely begin with either "5S", "5C", "4S", or "4C". If you are still unable to locate this information, be sure to reach out to your Meraki Account Manager and/or your Meraki re-seller to see if they can re-send the order confirmation email.
Hope that helps!
Jonathan
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