たいそうでわありませんでした
大層ではありませんでした
taisōdewārimasendeshita

Desu Copula
na-Adjective

The polite, past negative form of たいそう

1. Wasn't a big deal.; Wasn't excessive.; Wasn't a fuss.

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana