I just tested your site on speedvitals on the same 3G Slow Connection and the performance seems to be even worse:
https://speedvitals.com/report/giocone.com/5urvZR/
In the Cache status section of the Waterfall tab, check the resources served by Optimole. They have a very high response time. You should consider switching to another CDN.
I also noticed that all the images are being loaded during the initial page load. You should lazy load the below-the-fold images.
