Device activation & set-up – Pawfit Support

I have not received my verification code, what can I do?
It says my email address is invalid, what can I do?
When scanning the device ID, it says device already activated, what can I do?
I got this message 'Device offline or invalid ID', what can I do? [Pawfit 1]
I got this message 'Device offline or invalid ID', the LED flashes red when I press the power button, what can I do? [Pawfit 2 or Pawfit-S]
I paid my subscription, but the App was exited accidentally. How do I resume the activation process?
I am struggling with paying for my subscription. I paid for the subscription, but didn't prompt me to continue, or it is showing subscription pending what can I do?