I recently received a text from 84433 which is a company called Mediaburst. They seem to be real and respond to emails. The text was marketing some financial service. I googled 84433 and it took me to Mediaburst's website where it said that I could unsubscribe by sending "stop" to the number. I did this and then emailed the company to find out where they got my number from. Unsurprisingly I was told that another company had used their service to send the text. I asked for and was given their details and again, unsurprisingly, this turned out to be a marketing company. I have yet to pursue them to find out who they were acting on behalf of but I intend to do so as I'm fed up with spam texts. What has really annoyed me about this is that I now find that I was charged for the stop message. O2 treat it as a premium text. I don't see why I should have to pay to unsubscribe to a service that I never subscribed to in the first place. The charge was only 10p but if 10,000 recipients of the spam sent a stop message, someone is making £1,000 out of this. I have a couple of questions: 1) Does anyone know who is likely to have profited from this i.e. will Mediaburst receive any revenue from the stop message? 2) Is there a legal basis for the charge? I don't see where there is a contract between me and anyone other than O2. Of course O2 has offered to refund the charge but I would rather pursue Mediaburst or their client (or their client's client) if possible. I think there is a real point of principle here and I'm spoiling for a fight.