I purchased ringtones from Apple when I had my iPhone 6s. When I bought a new iPhone 8 Plus, everything as expected transferred to my new iPhone, so my ringtones are in Settings app → Sounds & Haptics. I wish to remove the purchased ringtones.
I chatted with Apple Support and they suggest I back up new iPhone and reset to factory settings to get rid of the custom ringtones.
Is there any other way?