I wholeheartedly apologize for the oversight.

Translation language

Meaning

A sincere apology for a mistake or failure to notice something.

John: 'I'm so sorry I missed your call; I was swamped with work.'

Alice: 'I wholeheartedly apologize for the oversight. I should have checked my messages more diligently.'

John: 'I wholeheartedly apologize for the oversight. I'll ensure we have a clearer action plan in the future.'

Alice: 'The deadline was missed due to unforeseen circumstances.'