I'm stuck at 25%

I'm stuck. Gwen and Alice have gone over, with me are Atul, Summer, Astrid and Giovanni. Giovanni hasn't given me his offering, so I can't use the ziplines yet, I can't access the mine, I'm missing the Rock Smasher and the Anti-Fog. But to do his missions I need the Rock Smasher. Also I can't find the merchant with the rare lithograph that the red spirit asked me about. What should I do?