Extras have specific deadlines that they need to be booked by. We've put together an overview for you here:
No, you can't cancel your booking online. If you've booked through condor.com, please reach out to our customer service.
If you did not use condor.com and 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.