Mail system is flawed
That’s your mistake so Anet won’t do anything about it just like if you accidentally delete or salvage the wrong item. It would be nice of the receiver to return the items in case of errors like this but they are not required to and it’s not against the rules to keep them so a report wouldn’t accomplish anything.
It’s your fault for mailing tons of items to a random stranger. Imagine you did this in real life. Would the person receiving your mail be at fault? Obviously not.
“Madness is just another way to view reality”
(https://www.youtube.com/watch?v=D-On3Ya0_4Y)
(https://www.youtube.com/watch?v=D-On3Ya0_4Y)