Hint App Charged My Card After I Canceled Subscription — Need Refund

Even though I had already canceled my Hint App subscription, the company withdrew money from my card without my permission. The transaction was made without my authorization, and I’m also surprised that the bank allowed this payment to go through without confirmation.

This was a subscription I started by mistake, and I canceled it immediately, yet after a month, money was still taken from my account. I want my payment refunded as soon as possible and expect this unauthorized charge to be reversed immediately.