Flutter App Rebranding & Build

I already own the full Flutter source code for an existing app; now I want every visible trace of the old brand replaced. I have the new app name ready, but everything else—logo, app icon, package name, and any in-app references—must be updated to match a fresh visual identity... (Budget: ₹600 - ₹1500 INR, Jobs: Android, Android App Development, Android Studio, Branding, Flutter, Graphic Design, Logo Design, Mobile App Development, Photoshop, User Interface / IA)