Requesting refund for unauthorized Picsart subscription charged by Apple

Hey, so i need your help. A few months ago i subscribed on weekly subscription of Picsart but before the payment my bank account was frozen so i couldn't even pay for it. Recently it got unfrozen and i had around $40 on it. On 1st august at 6 am i've got charged 14000 tenge($25~) and didn't even have any notification or reminder on that. I tried to ask for refund on apple support but got denied twice. I read on Reddit that if u change your annual subscription to monthly then you will get a partly refund but i guess it didn't work for me. Also wrote 2 letters to Picsart support, they replied to the 1st and then gor silenced. What can I do? I really need those money it's not a small amount for me.

[Re-Titled by Moderator]

Original Title: refund from picsart