Hi @
claire123.
Thanks for getting in touch - please can I confirm that this is the In Home Display that isn't working? I'd recommend if it is, the first port of call would be to turn it off, leave it for 20 seconds, then plug it in to the mains and turn it on again, in the nearest plug socket you can to the meter - this will help it reconnect to the meter. Ideally, if the display can be plugged in within 10ft of the meter this will help the process!
With regards to the app, if you can drop me a Direct Message, with some account details (you can click on the link in my signature to message me privately), I'll take a look at your account and see why it's only showing the electricity.
I hope this helps,
Thanks again
Pete