もっての ほかじゃありませんでした
mottenohokajārimasendeshita

Noun
Desu Copula
na-Adjective
no-Adjective

The polite, past negative form of 以ての外

1. It wasn't to be expected.; It was beyond expectation.; It was unacceptable.

Past/Perfective
Negative
Polite
Terminal Form