My question involves landlord-tenant law in the State of: Nevada

I signed a lease with an agent on a house in the first week of April. I put down the majority of the deposit and the lease shows what was put down already and the final amount due on the 1st of May. The check for the deposit has been cashed. About a week ago I received a call from the agent saying the owner is using a different property management company now and he would have me sign a paper releasing the deposit paid to the new company. Also the new company was going to call me and introduce themselves, etc. I received neither the call nor paperwork. After a couple day I called the agent and he was stumped on why I have not heard from them. Something told me to look online and sure enough the property was posted online by the new company as being for rent with a $50 increase in what my lease was signed for. I now have about a week before having to move out of my present location since a 30 day notice was given. Can the lease be null and voided due to the owner changing property management? I thought since at the time the agent was working on behalf of the owner as the agent/property management when the lease was signed, the lease was legally binding. I have heard 2 different things.