Weekly Pass Pro Billing Error Blocks iPhone App Downloads After Cancellation

I had an active subscription to Weekly Pass Pro on my iPhone, but I decided to unsubscribe because it started causing billing issues with my other apps. After cancelling the subscription, my phone began showing a constant error saying there is “a billing problem with a previous purchase,” and this prevented me from downloading other apps. Despite having unsubscribed from Weekly Pass Pro, the same billing problem message continues to appear and I still cannot download apps normally. This situation is disrupting my use of my iPhone and other applications, even though I am no longer using Weekly Pass Pro. I request that the Weekly Pass Pro subscription and any related charges be fully checked, that any possible remaining billing issue linked to this service be resolved, and that my account be restored so I can download and update apps without any error messages.