I upgraded to the free trial (30 days), canceled it just a few hours later. Correct via manage plan and "Cancel trial". This is three days ago. I still haven't received a cancellation confirmation email (yep, checked all filters). It clearly shows on my account that I now have DropBox Basic. But there is a €199.00 transaction going to Dropbox at my bank.
How do I ensure that no money is deducted for the free trial? Why am I not receiving a confirmation email?