LocationTool Subscription Cancelled But Still Charged

I have a paid subscription to the LocationTool mobile app, which is being charged directly to my bank card. I tried to cancel this subscription in the app on 13 February, but despite cancelling it there, the application is still attempting to take money from my account, and the last payment was taken yesterday. There is no customer or subscription number visible to me, and I do not know any support email address for LocationTool, so I have not been able to reach customer service directly. I am unhappy that money continues to be taken from my card even though I have already cancelled the subscription from within the app. I request that my LocationTool subscription be fully cancelled without any further charges and that the most recent payment taken after my cancellation on 13 February be refunded to my account.