>Commissioned person to make an avatar
>Asked questions about their style and what they like
>Came up with original character design sketches
>Loved it and coloured it myself to show how I wanted it
>Been working on it for almost 2 weeks now
>Got progress updates today. 

It uhh...it doesn't look good. 

How do I go about telling them the work they've put in so far isn't satisfactory without coming off sounding like a dick? 
I know I'm paying for it but still. I'm just not that happy with how it's turning out so far...