ROBBED me and have a no care attitude!!!

I went to buy hake at the Fisherman's Deli in Dunkeld and asked very specifically for 32x200g of pieces.I picked it up later.When I opened the bags,I found mixed pieces of 80 g,100g and 150g!!There was almost 2kg's missing which I was charged for.I phoned and they just said 'sorry' and they charge per whole fish.I asked then where my bones and fish heads were and whether they are planning to refund me or bring me the missing fish as I do not have enough fish for my customers and the manager told me that he is sorry but busy and cannot help me.Disgusting!!