Cover Pictures for social platforms

We have provided you with a HD png of our logo, we need you to make it into a montage using fashion, style and travel pictures that are visually appealing. We have also attached a image of a tumblr logo in the way they have done it however they have done a different theme, and we have also attached an attempt from another freelancer designer however we are not happy with their work and their communication is terrible. It must be designed in illustrator using vectors and not pixels. It must be done using the following 3 dimensions for different social platforms; Facebook: 851 x 315 Twitter: 1500 x 500 Google+: 480 x 270 It is important that you look at [login to view URL] to understand what we do. Basically we are a social network that lets users share their choices and styles with friends & followers and get opinions in real time.