Well, maybe one of them is a male and was sexed incorrectly.

You should know what the tank's humidity and temps should be at when you bought the snakes.

Temps- 92-94 on the warm side 82-84 on the cool side. Humidity should be 50-60%.

Seperate the snakes as soon as possible. Snakes are solitary, and not social and get stressed from being together.

That is probably why they don't eat anymore, they are stressed.

Check the caresheet about Ball Pythons in the caresheet section.

Welcome to the forums.