Replying to Bindings ripping out of new set up.. LAME!!!

Hello all,

just wondering if any of you chaps have any experience with ripping bindings out of a new set up,

the heel piece of my rossi binding is pullin out of my Volkl Wall,

the main question is who is to blame?
do i take the skis back to the shop where they were mounted? do i mail them to volkl as they are only 2 months old?

any suggestions greatly appreciated, apparently the walls ride better 2cm back anyway so maybe thats my solution.

peas and love