During the account set up process, you need to run a cell test to connect the panel to service. You dont need wi-fi enabled to run a cellular communications test. Are you able to run a successful Cellular Radio test?
From the home screen, navigate to Settings > Advanced Settings > System Tests > Cellular test. What is the result?
Afterwards, finish the account creation steps via the System Manager tab of your Surety login.
Once logged in to Alarm.com, finish the set up process Once connected to Alarm.com, set up w-fi on the panel via the method below: