Hi,
You can release an app named the exact same title string as another app, the package name (in reverse web URL format) is what keeps it unique, for example com.yourwebsite.yourappname or com.yourwebsite.yoursuitename.yourappname, but I would suggest a creative name for something going on the market!
Once you publish your application, you cannot change the package name. The package name defines your application’s identity, so if you change it, then it is considered to be a different application and users of the previous version cannot update to the new version.
com.brommko and com.zeroqode is used by accounts created by this companies.
After that make sure google-services.json is also using the same package name:
and replace the package name in the app
Best regards