ReelShort Charged Me $24 After Multiple Cancellation Attempts

I had a subscription to the Reel Short app, which I originally used through Facebook. I cancelled this subscription several times starting from last week, yet I kept receiving notifications from my bank that payment attempts were being made but declined due to insufficient funds. Despite these repeated cancellations and declined attempts, today a payment of around 24 USD was successfully taken from my account. I do not want to continue this service and I have clearly tried to cancel it multiple times, so I find it unacceptable that I am still being charged. I request that my subscription be fully cancelled immediately and that the payment taken today, as well as any other charges after my first cancellation attempt last week, be refunded to my account. I am no longer interested in the service, especially considering the price, and I want written confirmation that no further charges will be made.