How to change the Apple ID

Hi , I would like to ask , I Wan to update my app but then need to key in the password but then I found out that my email is type wrong from the start then now I Wan to change . But can’t . This is the email that I key in on my iPhone is *******@gamil.com but then the correct one is ****@gmail.com

how should I change to the correct one ?

or I can go down the any apple shop to reset for me ?

do get back to me soon thanks

thanks

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