I don't think it works that way... At least not on my Side of the Pond anyhow. When you get pretty much anything, Electricity, Mobile, Landline + VDSL, or Cable (Triple Play), you generally get stuck in a Two Year Contract with 'em. Though having just changed my Electrical Provider again. I think its only a One Year Contract. So although its in your right to tell 'em over the Phone that you wish to cancel your Contract with 'em... Over here we have to draw up a Letter that basically states I wish to cancel my Contract, at the end of the Current Term. Then sending that via registered Mail to their Billing Department. Then you should get something back in writing about when your Termination Date is due.