My apartment complex property manager refuses to renew my lease and has threatened me to move out because I am a single occupant of a two bedroom apartment lease holder do they hold a legal right?

The property manager has a legal right to refuse to extend a lease once it is up. However, you should look at the language in your contract. Make sure that they gave you a proper notice in accordance with you lease. If they did not, you will likely be able to stay in the apartment for at least another month.