All Contact names disappeared when I tried to Import/ Export contacts and sync to my gmail email
I have an Android Samsung Galaxy A8. Tonight, I wanted to back up all my contacts as I had over 400 contacts for a few years so wanted to do that. I went into Contacts Setting, then clicked on Import/ Export Contacts. The first time I did it, it asked me to sync/ back up with my gmail email. I thought this meant all my contact all my contacts would be backed up on Google Drive. However, after doing this, I can no longer see any of the names on my Contact List. Most names have changed to "Unknown name". When I click onto the name, there are no phone number information associated.
Only a handful of names are saved with Contact details and these are the newer ones I saved recently. If I go to "Customised List" in "Contacts to display" view, on my Contact list, I can see their names, photos and telephone numbers - but these are for people I have Skyped with the past and are all associated with a Skype name.
Can you please tell me how I can restore to the original version before I Import/Export and synched with Gmail? Can I unsync this and get back to the original view? This is over seven years of contacts that I was trying to save in the first place, so any help on this would be much appreciated.