Hi Pampas,
It depends on which excursions you've booked and how far in advance you'd like to cancel. There are some excursions which you'll book and pay for in advance, so those wouldn't be able to be cancelled.
If you can let me know which excursions they are and for which trip I can have a look into this for you, or give us a call and we can check 🙂
Many thanks,
Vickie