Untill now, I never had one problem, with something that didn't arrive, and I don't know Skybox.
Untill now, I worked with postal service, which tends to work better then in my former country, and DHL, which is quiet as good as it was in my country, but, just a bit less,as it clear, airtraffic is less here.
Also, you could search to send your goods in a container ? You could rent for instance 1 cubic meter for about 220آ€. Most probably, you could get a container thet will go to Fenix port, which is privatly owned, closed off and garded, thus safe.
Depending on the season, it can take a while to get you goods here, as transport goes over a river, and when the waterlevel is low, then certain ships can't reach us..