If you find a directory listing that belongs to your company, you can claim it.  Once you own a listing, you can edit or update that listing.

In order to claim an existing listing do the following:

1. Register if you haven't already.
2. Login
3. Find your listing
4. Click "Claim"
5. Enter a message explaining why you want to claim this listing as your own. (You may be asked to prove your connection to this business.)
6. Click "Claim Listing"
7. Your request will be processed within 24 to 78 hours.  You will be notified when it is complete.