Hi @Minzy , where did you buy the AP from? You need to go back to the seller and request that the device be removed from their Network/Organization.
Meraki support won’t be able to help you in this instance.
Darren OConnor | doconnor@resalire.co.uk
https://www.linkedin.com/in/darrenoconnor/
I'm not an employee of Cisco/Meraki. My posts are based on Meraki best practice and what has worked for me in the field.