For to make the booking valid you will have to pay the 50% of the price. You can do by Paypal.
Cancellation Policy
Day Tours:

If you cancel at least 10 days in advance  complete Return (1)

If canceled at least 5 days in advance  50% Return (2)

If you cancel less than 5 days’ notice  No refund
¹Refund complete except costs of return costs if need be.
²Refund 50% excluding costs of return costs if need be.
Packages:

If you cancel at least 20 days in advance  complete Return (1)

If canceled at least 10 days in advance  50% Return (2)

If you cancel less than 10 days’ notice  No refund
¹Refund complete except costs of return costs if need be.
²Refund 50% excluding costs of return costs if need be.