How to clear the work network cache?

Question

Domain Name System

Hello! There is a problem.
I completely updated the site and it has been working successfully for a couple of days. But when I go online in the office, I see the old site. The hosting support told me that this is a problem in the cache of the working network.
Can I somehow initiate the cleanup process? They say that he himself will be updated someday, but it's critical for me. I need to work on the site, but I can’t even enter the admin panel from the office.