That is a shame. Is there an alternative VPN provider that wouldn't be subject to this? Huh? Why all the downvotes all of a sudden? this is a genuine question.
What's happened here is the best way it could possibly go. A warrant was needed which meant prosecutors / police had to meet a certain bar to conduct a search, and when the search happened the data does not exist anyway. That's exactly what you want from a VPN. This isn't "a shame", it's cause of celebration that the process actually worked and the provider can clearly demonstrate that.
I guess the only alternative would be a country which passes a law saying that VPN data (or something including VPN data) could never be searched, but that's extremely unlikely of any country at the moment.