<human>: Give me the gist of the text in a nutshell

[Ca]Last year I started living in a friends apt. while watching it.  He moved out during the time, and i moved in.  Everything was done legally, met with the land management guy, paid for a credit check, signed a new lease.  There were several things that needed work in there, which i didn't really care about, namely was the carpet which was gross.  Since I was already moved in during the walk-through, I didn't want to move everything out and back in, so I told him I didn't care if he didn't replace the carpet, as long as I wasn't going to be charged for it being replaced when I vacated.  He agreed and it was written in the first paragraph of the lease.  Today when I went to pick up my deposit, I saw he had charged me over $400 for the carpet.  He was not in the office only his young secretary, and she even said that it was bullshit after I had her read the lease. They also charged me over $100 for a screen door they replaced, which after looking up were only $60-$80.  I am going back tomorrow, but would like to know what course to take if he refuses to honor the contract and produce a receipt  for the door, before I meet with him.
<bot>: landlord is charging me for a carpet to be replaced, while the first sentence on the contract says I will not be charged for the carpet when I left, and is overcharging me for screen door.  What are my options?