How do I retrieve a picture message from...

Question

I received a pic message from a virgin mobile subscriber in the UK. I am a Vodacom subscriber in SA. The sms says to log onto www.virginmobile.co.uk/getmessage, if I do that it asks for a virgin mobile number, which I enter from the number that it was sent from + the message code.

It then throws me out, so which number must I type in to be able to retrieve this d**n pic message.

Thanks for your help.