Wrong file is being hosted on my website hosted on hostgator

I am new to hosting websites and just yesterday i tried to host a simple html file on hostgator by just putting my index.html file in public_html directory. But whenever i check the website, its not showing some other html file. I think it is some default page set by hostgator. Can anyone tell me how to resolve this issue? My website is https://kingflynft.in Right now my index.html only contains a simple "hello world" text.

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