I have wrongly charged
I have not subscribed the app and I was charged for the same
iPhone 11
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See your purchase history for the App Store or iTunes Store https://support.apple.com/en-us/HT204088 to make sure the charge is from Apple. And, see If you see apple.com/bill, itunes.com/bill, or an unfamiliar charge on your statement https://support.apple.com/en-us/HT201382
Apple usually considers all sales to be final. But, if you have a problem with a subscription or a purchase, see Subscriptions and Purchases https://support.apple.com/en-euro/billing. If you think you may be able to get a refund, then use the request a refund link. It will take you to Request a refund for apps or content that you bought from Apple https://support.apple.com/en-euro/HT204084
See How long refunds from the App Store or other Apple services take https://support.apple.com/en-us/HT210904
You also can get Apple telephone support for help in solving your problem using this link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362 Be patient; sometimes you can't get immediate telephone support.
You also can use Apple Support Twitter https://twitter.com/AppleSupport. There may be an hour or so wait.
And here is how to contact iTunes worldwide support via text or chat using this link https://support.apple.com/choose-country-region/itunes. After choosing your country, see the heading Tell us how we can help.