Translation of blackmailer in German

Thank you for correcting my German, I always get confused with the words that put the verb at the end. Like the zu and the ab and the an... All new to me. I truly wish to continue our friendship.
Our fisherman stopped the boat and his nine year old girl opened a box with souvenirs, clothes and hats. We were in the middle of a river not going anywhere and had to start buying things.
We had never seen a similar landscape. The lagoons had different kind of colors, blue, white, green and red. They were all surrounded by rocky, dark volcanoes making the entire landscape surreal.