1. Ensure that your contact's phone number is saved correctly on your phone. It should be saved in international format: + [Country Code] [Full Phone Number].
2. Open וואצאפ and go to the 'Contacts' tab. Pull down the list of contacts to refresh it.
3. If the contacts are still not appearing, go to your phone's settings, find the 'Apps' or 'Applications' section, then locate and select וואצאפ.
4. Once in the וואצאפ app settings, find and select 'Permissions'.
5. Ensure that the permission for 'Contacts' is enabled. If it's not, toggle the switch to allow וואצאפ to access your contacts.
6. If the problem persists, try uninstalling and reinstalling וואצאפ. Remember to backup your chats and media before uninstalling the app to avoid losing any data.
7. After reinstalling, verify your phone number and restore your chat history. Your contacts should now be visible within the app.