You can tell the police, but not much is likely to happen. You can tell the Postal Inspectors, who have the right to close their post office box and even stop mail getting delivered to them, but they are probably using an address that does not belong to them anyway.
You seem to have come here before you deposited a check that was destined to bounce, and before you wired them any money. Often, people come here after they are scammed, asking what to do after the check bounced (often a fake cashier's check), the bank asked for the $1800 (or whatever) money back, and the bank closed their account. Better to avoid quicksand than to see if there is any way to extricate yourself (you can survive quicksand, but once you have deposited a bad check and spent the money, it just keeps getting worse.).
Shopping Southeast Pennsylvania, Delaware above the canal, and South Jersey since 2008