Please help us to deactivate licenses

Hello, 

I'm Cecilia, our
company/organization account is Wenzao Ursuline University of Languages company/organization account
we have 70  SDL Trados Studio 2021 Professional (Network SN) licenses just bought this yaer
we currently have 63 licenses in use, but some of them are used abnormally. 
We suspect that they have been activated without consent.
Now we want to re
activate all licenses again.
If possible, we would like to ask you to help to deactivate all the licenses that are in use,


Thank you very much.