Lumia 1020 - UK Release - 12TH September

No reason. I just clearly stated that I cancelled the airtime contract within 7 days and as per contract, you shouldn't have to pay the remaining airtime cost. Adviced to stop the bank direct debit.

Though someone mentioned that you can cancel the airtime anytime not just within 7 days.
 
No reason. I just clearly stated that I cancelled the airtime contract within 7 days and as per contract, you shouldn't have to pay the remaining airtime cost. Adviced to stop the bank direct debit.

Though someone mentioned that you can cancel the airtime anytime not just within 7 days.

To be clear, with O2 Refresh you can cancel the airtime plan at any time once you pay off the phone plan. 7 days is irrelevant.