PicsArt Charged Me ₺519.99 After Cancelling Free Trial

I started the 7-day free trial for the PicsArt app, and it was stated that I would receive a reminder before the trial ended. However, on the sixth day, I didn’t receive any message or email, but I canceled the subscription because I wasn’t satisfied with the app. Despite this, the next day, ₺519.99 was charged to my card, and I received a message stating that my annual subscription had started. This is unacceptable, especially since I canceled before the trial ended. I no longer want the subscription as I didn’t like the app, and I’m requesting a refund. If this issue isn’t resolved, I will be forced to pursue legal action.