Canon MF237w Scanner Stops Working After Software Update

We purchased two Canon MF237w printer-scanner units for our school administration to use. We used the scanner function without any issues for a while at first, but after a computer update was installed, the scanning function stopped working, and we haven't been able to use the scanner since then.
This problem has now been going on for about a month. We reached out to the seller, and they were responsive but couldn't fix the issue, and we simply haven't been able to get in touch with Canon's authorized service center. Not being able to reach the service center, and still not being able to use what should be such a simple function, has put us — as a school administration — in a genuinely difficult position.
We're requesting that Canon's authorized service center contact us as soon as possible and resolve the scanner issue on our devices, whether remotely or on-site if needed, and provide the technical support necessary for us to use all of the printer's functions without any problems.