Watercolor World Map Wedding Guest Book Jigsaw Puzzle

I am extremely disappointed with this product. I assumed that this would come complete instead of trying the impossible task of finishing this puzzle. After 3 days of attempting this, I have finally given up realising there is a piece missing!! Surely, with the majority of pieces being plain white, the back of the pieces could have been numbered, or a least a different colour. I thought I was purchasing a piece of art for our special day but instead have bought stress. We are getting married in 2 weeks and there is no way that we would have this finished in time. .