Contact Form – missing submissions

I am using the Contact Form 7 and Contact Form DB plugins – but seem to be missing 10 days worth of submissions.

I can see no reason for why this has happened (usually form submissions daily) – the site was not down, GA suggests that goals were completed.

Contact Form DB usually is a back up in case Contact Form 7 emails do not come through but even this is not showing the completed form.

Is there a way of recovering any missing form completions?

Any help greatly appreciated.