Night Market quest with Envolope. I need help (Grand Dream City)

[ColressS2]

I was told to "Put the envelope in a mailbox in the district south of us." But this is no fucking district that is south of the dream district. So I am so fucking lost and honestly about to go insane. Where is this mailbox???

Help me

[ColressS2]

UPDATE: After some googling, aparently the game is a damn lier and the mailbox is NORTH?? *cries*