Assuming that the guy named "shopping" didn't steal you the PDs, the only i explanation i have for that is:
When he asked you if your forum account was Giovani, you told him yes (your name is actually Giovani380 and not Giovani only)
I did a quick search and found out this:
So the DTs were probably sent to "Giovani" account and not the "Giovani380" that you are using. Check if the DTs are on that account. If you can't access to it ask a GM to help you.
This is based on assumption. But if turns out to be the case, next time be more precise with those kinds of informations, because you can easily avoid problems if you give correct and precise information to other people.