You may need to connect Edusync Google to a different tenancy from the one you connected to in your initial setup or you may have just made mistake connecting to the wrong tenancy. Below we'll help you to connect to a different tenancy.
Go to gsync.wonde.com/reconnect
Click Login to Google
Allow access for Google's APIs to be used by Edusync
Congratulations, you've successfully reconnected to a different Google domain.