I have lost all my contacts. Can't restore from Gmail.

So, I recently got an iPhone.

I transferred contacts from my android phone using a CardDav.

A while later I downloaded Cleandupes, an app to get rid of those pesky duplicates.

It trimmed my contacts from 1600 to 600 contacts. Great!

I deleted the app.

I then returned to my phone today and found that I have only 68 contacts left.

They are not on iCloud, they are not on iTunes. I tried to put in another CardDav to get them back from Gmail, to atleast start where I was a month or so back, but my phone says it already has this CardDav in action. Surely my Gmail still has my contacts!?

Any ideas what has gone wrong and how to solve it?

Thanks

Andy