After a fairly prompt 5 minute call to rectify things the Sky agent made the usual parting comment as to whether there was anything else he could do for me. To which I gave the stock answer, you could always give me a price reduction, his reply was hang on a minute and I will check.
Back he came a minute later, how would you like 6 months half price Sky Sports, which I of course graciously accepted.
So my fraudulent card user saved me £63 in the end, not a bad outcome.

