on 02-05-2013 10:42
Open up the bill via My O2 and choose the option to download as pdf. You should then see the bill as a tax invoice.
on 02-05-2013 12:16
Give them a ring and ask for Vat billing to be turned on for your account.
Sky Unlimited Broadband - Windows 10 - Nexus 4 Android 5.1.1