I think there's been a misunderstanding.

Meaning

I believe we have different interpretations of something.

Examples

• John: 'I thought you were responsible for that task.'
• Alice: '<b>I think there's been a misunderstanding</b>. It was assigned to David.'
• John: '<b>I think there's been a misunderstanding</b>. Let's review what happened.'
• Alice: 'I'm disappointed with the outcome.'