What, she doesn't have a sledge hammer? Break the lock, get your stuff, find the crook and douse her with gasoline, threaten to light it until she transfer money back to you.
Now who put the lock on the door? Was it the government (for employing persons not authorized to work in that type of position)?
The mall owner (for nonpayment of rent?) - I’m assuming the previous tenant kept the money rather than sending it to the mall owner.
The mall owner may have policies about subletting...not sure.
The previous tenant (to complete the scam?)