Bought a 100% Helm's Deep that is not 100%

CNH1974 · 2013-05-22T11:18:59.000Z

I bought a Helm's Deep used that was listed as complete. The listing said it had been built once. I have received, its in good condition, even the box is not very squashed. However it is not 100% complete. I have built it and it is missing approx 10 pieces. Mainly small ones but the most signifcant is the Legolas minifig's legs. Other pieces are 1x2 bricks, 1x2 cheese wedges, 4x 1x1 brick with single side stud replaced with a 1x1 light brick. Now as I do not want to return it, because I have spent time building and its a right pain to wrap it up and re-post, what should I ask for when I query it with the seller? I am hoping they will have the parts..