おかげでわありませんでした
お陰ではありませんでした
okagedewārimasendeshita

Noun
Desu Copula

The polite, past negative form of おかげ

1. It was not thanks to you.; I couldn't have done it without you (ironic/sarcastic).

Past/Perfective
Negative
Polite
Formal Register
Usually Written in Kana