Question

I signed a rental lease agreement on November 17, 2008 for my move-in date to be December 1st, 2008. I contacted the rental agent via emial on November 20th, 2008 and asked her if I changed my move-in date to the 5th of December, would my 1st month's rent be prorated. Her response was that I would need to pay full months rent to move-in on the 5th and my January rent will be prorated to deduct the five days I was not in the property. I contacted the agent via email on December 11, 2008 to ask her what my rent would be for January, and she told me the full amount. I advised her of what she told me Nov, 20, 2008. She has the property manager call me and told me that I was told the wrong thing and I would have to pay the full months rent. So my question is, if their agent gave false information, shouldn't they go by what I was told or do I take the fault for being told the wrong thing and pay a full month's rent?