Here are some steps you can follow to retrieve contacts from your iPhone:

1. Log in to your iCloud account on your computer.
2. Click on "Contacts" and select the contacts you want to retrieve.
3. Click on the gear icon at the bottom left corner of the screen and select "Export vCard".
4. Save the file to your computer.
5. Connect your iPhone to your computer and open iTunes.
6. Click on the iPhone icon in iTunes and select "Info".
7. Check the box next to "Sync Contacts" and select "Windows Contacts" from the drop-down menu.
8. Click on "Apply" to sync your contacts.

Alternatively, you can also retrieve contacts from iCloud by following these steps:

1. Log in to your iCloud account on your computer.
2. Click on "Settings" and select "Restore Contacts".
3. Select the archive of contacts you want to restore and click "Restore".