Ondrej

Hi,
I ask You for a little help. I've got six map pieces and I need one more. But I'm unable to find it. From those three missing pieces - one of them I'm unable to get, because I ruined a dialogue with one of the map owners. The second missing has Kollberg, travelling merchant, but I am absolutely unable to find him. And the third has the unicorn. I found him, he promissed me that piece, but I'm not able to meet him again. So, do You have any ideas, how to continue? F.e. where to find that merchant? Or how to meet the unicorn once more? Because now, I'm not able to continue. I'm still wandering around Phexcaer to meet the unicorn and around Clanegh to meet the merchant, but without any success.
Thank You for Your help.