This drone is a bit old since they are releasing the 720R in a few weeks. Unfortunately, the 720G has issues with ghost controls just like the original 720E. Basically the drone will fly away on you and you can't control it. I had it happen once on the 720E but I didn't have the issue with the 720G but I two people have reported this same issue with the 720G within the last week.
Finding a Surron contact would kind of depend on where you are located. Surron is based in China, but a good place to start would be Luna Cycle in California. I am saving up to get mine!