Extras must be booked by specific deadlines. We have compiled an overview here:
No, you cannot cancel your booking online. If you have booked through condor.com, please contact our Customer Service.
If you do not book through condor.com, If you booked through a travel agency or a third-party provider, please contact your provider.
You can choose whether to change the entire booking or just a date or an airport. You can get a step-by-step guide here.