To add to this, running that query once will probably only show you a limited view of what's all going on in your system depending on how long query plans...

It sounds like there are multiple issues here.

First, where is the SQL Server service running that has this database, on your computer or on a server?

Second,...

Do you know when the log file is growing?  If not, you might be able to look in the default trace to see log growth events:
SELECT td.DatabaseName,...

Of course quotas don't work out too well for salespeople either.  It was just this year a big scandal hit Wells Fargo because of people creating fake accounts to be...