Editing Playlists on a new store set-up 8Plus

New iPhone 8 that the store transferred all my data onto over from my old failing 6+

iTunes just welcomes me to either set up as new or restore from old back-up.

Problem is the old back-up is corrupted and very old due to recent backups not registering as a problem but now found to not exist.

The new phone option undoes new email accounts and other personalisation that I and the store have spent hours doing!

All I want to do is edit my playlists and add new tunes from my library.

The 'phone icon in iTunes is grey not black.

How can I easily get access to my playlists etc with no options available for that purpose other than either taking on board corrupt and out of date data or starting all over again as a new 'phone?

John