Apple media service payments issue

I have choose a free trial version of tezza a photo editor app and i cancelled my subscription a day before the renewal date still my amount is deducted because its a auto upi mandate. I have no clue what to do next . Please help me out. When i go through the apple support there is no purchasing history visible in that still i raised a concern through its a scam then and also mailed to that third party app but there is no response from their side.