I assume you chose the phone and tariff you wanted?
If on refresh you can pay off your phone and change to a cheaper sim only tariff for the airtime but you won't get anything knocked off your current tariff.
If you are due an upgrade, shop around for the best deal for you.
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.