Cancelled subscription and still got charged. Need refund, help!

I created a Shopify account with the ₹23 a month. U used it for a day and never went back on the app. I randomly got charged like ₹2352 rupees a month later even though I had deleted the app. I never knew I was being charged. This just happened I need a refund because literally all my money is gone to something I did not know I was paying for.