Luminous Invites

I’m requesting a refund for Etsy Integration ‑ DPL on luminousinvites.com. I uninstalled the app on 1st October after being told billing would stop, but was charged £15.19 on 3rd October, invoice #598747737. Please review the charge against my uninstall date and refund it. Please also confirm that no further recurring charges will be generated.