first and last months rent

When I moved into this apartment, I paid first and last month's rent to the landlord, and a realtor fee equal to another month of rent. ("Is there a security deposit?" "No, this landlord just wants first and last month's rent.") As February will be my last month living here, I thought February rent had been pre-paid.

The landlord just turned up demanding rent. In the world as he understands it, "last month's rent" can be re-imbursed after the tenant returns a clean apartment with no nicks or scratches. But only an irresponsible idiot would take it as any kind of license to not pay. *eyeroll*

I'm looking for a new apartment, and concerned about this guy being a reference for future landlords. Even though the most critical information he is likely to give a future landlord is that I can be bullied.