Flutter Template Kit with unlicensed font

Hello,
I bought in 2021 a Flutter Template Kit for may current application. In downloaded .zip file there was a complete source code of an application with included fonts.

The product page was free of information about need to buy additional licenses to use the fonts included. Nor there was an information in .zip file or the downloaded assets.

Now the owner of the font found out that i use the font and wants me to buy license.

Here are few information:

  • Author license was broken - he sold asset without a license in sold item
  • Envato license was broken - paragraph 13 means that if you include assets with different license - it should me show and license file included.

Who should pay the license fee right now?