ったり まえではありませんでした
attarimaedewārimasendeshita

Noun
Desu Copula
na-Adjective
no-Adjective

The polite, past negative form of 当ったり前

1. It shouldn't have happened.; It was not to be expected.; It was unacceptable.

Past/Perfective
Negative
Polite
Formal Register