You need to separate the two budgies into individual cages.
Put each cage in a different room and play music in each room to help muffle the sounds of them calling to one another.
You'll need to spend time with each of the birds individually.
If that means moving the cages from room to room in order to do so then that is the course of action to take.
Allowing the two birds to be in the same cage is a recipe for a disaster just waiting to happen.