Move Premium subscription from Vodafone to another account

[Nrushworthw]

Hi- I have a subscription via my Vodafone account. when setting this up I accidentally logged in to spotify and set it up via my sisters Facebook. I really want this subscription to be moved across to my account is this possible? What's the easiest way to do this? Vodafone have told me that I need to go through spotify to do this.