I rented a place for about 3 years and was never l...

I rented a place for about 3 years and was never late with my rent, I kept the place clean, and it was not clean when I moved in. I cleaned when I left and there was no damage other than "normal" wear and tear. When I decided to move and sent them a written notification they said I was suppose to physically come to their office, so they refused to refund my deposit.