I sent them an email today due to my not getting a decent reception anywhere. Got this in reply:
Dear Sir / Madam
Thank you for your email. The Executive Office deal only with Regulatory Bodies and issues raised via Board Members.
If you require assistance, please contact us via the following channels:
1. You can call us on 333 (free) from your 3 mobile or on 08707 330 333 (standard rate) from any other phone. If you’re a Mobile Broadband customer, you can call us on 500 from your 3 mobile or on 08707 330 320 from any other phone (both numbers charged at standard rate).
2. You can log onto My3 online and send us your email via our web form. Go to My3 > Contact 3.
3. You can log onto our website and send us an email via our web form. Go to three.co.uk > Help & Support > Contact us
Yours sincerely
Executive Office Administrator