Re: teeth whitening site advert
On the subject of cancelling not being possible to do by phone/online -
We were with UK2 for about 6 years, with domain names and hosting packages. Then when we found somewhere a bit cheaper and with a bit more flexibility than UK2 (at the time, even having access to configure your own DNS records was something UK2 didn't offer without contacting support) - so we turned off auto-renew on our services on UK2 and started moving stuff to the new host.
UK2 eventually started complaining that we had a massive bill, because unlike every other company on earth that cancel your service after a few months of not paying for service, UK2 apparently keep your service active and keep the meter running until some time in the future when they contact you to let you know that you know them £500 for not cancelling your service.
Additionally just to make it really fun - you can't / could not cancel online, by phone, by email, by fax. Nope - they only accept cancellation requests by letter and IIRC at the time obviously carried an admin fee.
Will never ever deal with UK2 again, we didn't pay we just ignored them, for all I know the service might still be sat there racking up thousands of pounds of debt.