Sorry this will be too late now I'm guessing.
But yes, raise an internal non conformance and fix the system with the engineers so it doesn't happen again.
Secondly is there anything you can do internally? So do you have calibrated dataliggers for example? What I'd do is a risk assessment on continuing to use the equipment while it's out of calibration. For that you could use a few techniques for your data sources and justification, so for example:
Temperature probe records
Data logs
A review of product micro
PPM records to prove internal maintenance
Any contact with the company on likelihood of it being out of spec
Previous calibration results (especially if they don't normally need to make adjustments)
What you're trying to do here is get some data together to confirm for yourself (and an auditor) that there is no evidence that the machinery is out of calibration.
Once it's all fixed do make sure you do a couple of things, make sure that preventive action is nailed down so it can't happen again but also include this in your
HACCP review. That will prove it's all been taken seriously as even once it's back in certification, it could still be a non con and a future issue if you don't.
Bloody engineers!