refund of subscription

Hello! 04/05/2020 my son, mistakenly bought a paid subscription, for microsoft office 365 (Family and Personal number of order MV9MYWD7S8 MV9MYWM48D) applications, most likely he did it to me evil, because recently we quarreled a bit, because of the game console, he spends too much time playing games. The application was purchased through iTunes on my PC, without my consent, knowing the Apple ID password. I did not give consent to this purchase and do not plan to use this application. I apologize for the situation and the inconvenience, with respect to Baurzhan.