It doesn't sound as if they have a complaint, they have apparently signed up for broadband and cancelled within the 30 day period.
The first invoice will have been raised, but now will probably be cancelled, it just takes a few days for the system to catch up.
It sounds like a fuss about nothing really.
They seem to think they can contact O2 directly through the customer forum, which will not work.
A simple phone call would sort this out I am sure, but we don't have enough information in the post to know exactly what has happened.
To support Disasters Emergency Committee: http://www.dec.org.uk/appeals text Nepal to 70000 to send £5
Sky Unlimited Broadband - Windows 10 - Nexus 4 Android 5.1.1
