Phrases Handling Complaints and Apologies

I assure you it won't happen again.

B1

Meaning

I promise that the problem will not recur.

Example sentences

John: 'This is the second time this has happened.'

Alice: 'I assure you it won't happen again. We've taken steps to prevent this.'

John: 'I assure you it won't happen again. We'll address this issue immediately.'

Alice: 'This is unacceptable.'