Missing Licence

Hello,

On the 3rd of January 2019 I downloaded the track “simple-inspiration-piano-4NWLHUT” by Olexandr Ignatov, as part of the Monthly Freebies Download pack.

I used it for a YouTube video and now I got a copyright claim from the author. I went to the original file to retrieve the licence but there was none, only a pdf called “How To Choose Music For A Project”.

Is it possible to have the licence so I can prove I used it legally?

Thank you,

Santiago