If you wish to change your existing ticket type, ie. from Adult 9 km to a competitive ticket as a example.

You can log into the account that the ticket is under and change the order.
Once you enter the change order screen there is a option to “Upgrade ticket” if you click this you can select the ticket you wish to change and the new type of ticket you require.

If there is a difference of price from a lower price ticket to a higher price ticket you will be required to pay the difference.

If you are changing from a higher priced ticket to a lower priced ticket there will be nothing to pay and the difference will not be refunded.