Communication with Google server

Continuing my previous message, I encountered the same kind of pb that the one I have had about whatsapp: transferring an application (IPhiGénie), I initially bought on Googleplay, from my previous mobile requested some communication with Google, which once again failed…
In this case, the kind of solution some found for whasapp (saw the suggestions, which did not really work with me) cannot be applied here…
What do you suggest?
Thanks, Antoine