Facebook contacts on iPhone 4S

I got an iPhone 4S the other day & at the Verizon store they were able to transfer all my contacts from my old phone (Droid Incredible), and on that phone with the names on my Contacts List, it would automatically give me the option to link that info with the person's Facebook profile, so that when I opened a contact I would see their profile picture, all their phone numbers, email address, etc.

I was told that with my new iPhone would be able to do the same thing, that once I downloaded and installed the Facebook app, the first time I opened it and logged in I would be prompted as to whether or not I wanted to sync my contacts, but THIS DID NOT HAPPEN.

So now my contacts list has several names listed 2-3 times, once I guess from my old phone, once from Gmail, and maybe once from Facebook?

I've tried looking through all the settings, for 'Contacts,' 'Accounts,' even Facebook itself, and I haven't been able to find ANY place where I can merge or sync my contacts to get them how I want.

Has this happened to anyone else? Is there not a way to look at my contacts list, see just one listing for each person, and have that listing include their Facebook profile picture, all their phone numbers, their email addresses, etc.?

Help please!