It's to bad you already ordered them.
Not the best idea to take home some frogs when you still didn't get the tank in order.
That is why you need to prepare the tank a while before getting the frogs.
Problems like this with the temperature may need some tweaking, doing this with the frogs already inside may pose problems to them.
Auratus need a temperature of 75-79 fahrenheit, so it's still way off.
If possible, the best you can do is wait just a few weeks before ordering them home.
You might put in some bulbs with a higher wattage, try a heat cable or mat or put a aquarium heater in the water part if you have any.
When you get you're temperature in the right region for a couple of days, you're ready to get yourself the frogs, although it's best to see if you can keep the temperature up for a couple of weeks.
In the mean time the plants and mosses have some time to adjust, probably some will die and you can change them without disturbing the frogs in the terrarium.