The use of Envato on Facebook

I used and acknowledged an Envato piece of music, “Farewell” by lucafrancini**, in a Facebook post on 16 August 2020. Today Facebook notifies me that the section of the audio containing the music has been silenced because of copyright reasons. I do not understand. Can I not then use Envato music for Facebook posts, even if I do acknowledge the source and composer in the post? What did I do wrong, and what can I do to prevent this from happening again? Waseem’s three-part question on January 5 seems to apply, but when I look it up, I find no answer to what he asked.

Hey it looks like Haawk Identifyy might have started to monitor Facebook too, not only YouTube. Please write me via profile page and link me your post and we’ll figure this out.