Netflix Premium

So I've noticed that I have a Netflix premium that has at some point been added to my bill? I never wanted, bought or selected this when setting up my Virgin account and Netflix has no accounts with my email address. I don't watch Netflix through Virgin, so I'd love to know why it was added in the first place? I've looked everywhere for a way to cancel the subscription, because apparently (not) there's a way to do it online? Anyone know how?