Go to the iCloud.com website and verify that all of your contacts are there. If they are OK there, sign out of iCloud via system prefs, iCloud icon. Select to delete the contacts from the computer.
In AB, you should have no contacts there. If you do, delete them.
Go to Finder, select Go and hold the option key down. Select Library in the submenu. Go to the Preference folder and find the apple.com.addressbook.plist file. Move it to the trash.
Sign back into iCloud and restart AB. See if it's OK.
If your contacts were not at the iCloud.com website, sign out of iCloud and choose to Keep Contacts on the computer.
Then, follow from Go to FInder, ****.