Hypic Pro Subscription Charged Monthly but Features Stay Locked

I downloaded the photo editing app called Hypic through the App Store and purchased a Pro membership. $9 is regularly deducted from my account every month. Despite this, I haven't been able to use any of the app's Pro features since around May 30. Instead of recognizing me as a user with an active subscription, the app keeps opening the purchase page again every time, acting as if I have no subscription at all. It's not acceptable for a service that's being regularly paid for to be unusable like this. Since the problem started, I've written to the in-app help/support section multiple times. Either I got no response at all, or I never received a satisfactory reply that actually addressed and resolved the issue. While my account continues to be charged every month, this lack of communication and disregard has left me feeling completely let down. Not being able to access the Pro features I'm paying for has been frustrating both financially and emotionally. When I started paying for the Pro membership, my basic expectation was uninterrupted access and accessible, solution-focused support if a problem came up. Instead, I'm not getting what I'm paying for, and the lack of any solution has seriously damaged my trust. While users are regularly billed for their subscriptions, I would expect the same level of care to be given to service quality and customer support. For these reasons, I'm first requesting that my Pro membership be properly recognized on the device and account I use, so I can urgently regain access to all Pro features. I'm also requesting a refund for the entire period since May 30, during which I haven't been able to use any Pro features. Otherwise, I want to clearly state that I'll pursue all legal options available to me, including filing with the Consumer Arbitration Committee and, if necessary, taking legal action. In light of this complaint, I expect my subscription to be fixed, my situation to be resolved, and the necessary technical and customer service improvements to be made so this problem doesn't happen again.