While the vandals were breaking windows, someone called / was calling the police. Thieves entered the house while everyone slept / was sleeping.

Правильные варианты:

1. While the vandals were breaking windows, someone called the police. — Пока вандалы били окна, кто-то вызвал полицию. Короткое завершённое действие употреблено в Past Simple.
2. Thieves entered the house while everyone was sleeping. — Воры вошли в дом, пока все спали. Длительное фоновое действие употреблено в Past Continuous.