I am having the same problem, so would be interested in your findings. Went away to Greece for a while with all working, and came back and the Car Charger is offline, and I cannot set it to plug'n'go and there is a schedule active that cannot be switched off / deactivated.
Sent an email to GivEnergy yesterday. Installer recommended updating the software, but it crashes during the update. Not heard back from GivEnergy yet either.
Is there a better way than email to create a support ticket?
ETA : I did a power reset on the charger in the gateway, and it's come back online. So that solution seems to have worked for me. Not tried the software update as yet.