おかげじゃありませんでした
お陰じゃありませんでした
okagejārimasendeshita

Noun
Desu Copula

The polite, past negative form of おかげ

1. It wasn't thanks to you.; I wasn't helped by you.; I didn't benefit from your kindness.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana