Pickup cancellation is only possible for some specific carriers, which are: MyDHL, GLS Italy, UPS, FEDEX and TNT France.
In order to proceed you can click on Cancel from Pickup Manager section inside your ShippyPro account:
If you'd like to cancel a pickup for a Carrier which is not present on the list above you'll need to proceed directly from Carrier's website or through VoidPickup API Call.
Would you like to know more about Pickups? Try to take a look here!
Done! 🎉