Cathay Pacific Asia Miles - Cancelling rewards tix

I have redeemed a pair of award tix for HKG-Kota Kinabalu in June.

If I need to cancel them, can I just do it on the booking site and will the fuel surcharges I have paid be refunded automatically in the credit card it was debited? Or do I have to call the Asia miles hotline to do the cancellation?

Thank you for any input!

I haven't seen anywhere in the website that allows me to cancel tickets online.

Generally we do it with agents http://www.flyertalk.com/forum/cathay-pacific-asia-miles/1250393-keeping-miles-alive-indefinitely-mpc-says-its-possible.html

Thanks.

Since I booked the award tix on the Asia miles site, will call them for the cancellation.