Cancel Playletink Subscription

For some time now, I have been charged for a Playletink subscription through the Apple App Store even though I only intended to make a one-time purchase and have never used the service. Several months ago, I was charged 31.99 USD via my Apple account (Apple ID: munzm***[email protected]@yahoo.com). I did not knowingly approve any recurring subscription and I did not use Playletink after this one-time transaction. Despite this, the subscription appears to have continued and I am being treated as a subscriber. I request that my Playletink subscription associated with this Apple ID be cancelled immediately and that the 31.99 USD, as well as any other charges taken in connection with this unintended subscription, be fully refunded. I expect the subscription to be fully terminated so that I will not be charged again in the future.