Cancellation Of ShortMax Subscription

I had previously unsubscribed from an app service provided by Shortmax Innovations around six months ago, yet today I was charged again without my consent. On today’s date, a deduction of 19.90 SGD was made from my account, and in the transaction record this appears as a payment to “Shortmax Innovations.” The original subscription was made through the Apple App Store, and I have not re-subscribed to this service. I contacted my bank about this deduction, but I was informed that they were unable to do anything about it and that I should resolve the issue with the merchant. I have not been in contact with Shortmax Innovations or Apple support before this, because I believed my previous unsubscription had fully cancelled the service. I request an immediate and permanent cancellation of any subscription linked to my card or Apple ID under Shortmax Innovations, a full refund of all charges that have been taken after my unsubscription, including the 19.90 SGD deducted today, and written confirmation that no further deductions will be made without my explicit consent.