Bad Situation…Need advice

[Gary Thao]

I'm making a long story short. Let me know if more details are needed and I'll provide.

This situation occurred in Portland, Oregon. I signed a 6-month lease agreement for an apartment. When I moved into this apartment it had a very bad pet smell. I informed the leasing office and was given a different apt over a week later to which I was given a blank lease agreement to sign. I was unable to move my items due to work and my friends not being available during the week. The leasing office provided maintenance to move them due to their mistake. All my items were stored in plastic 25 gallon storage containers with locking lid.
All items were moved in while I was at work. I later started organizing my things and noticed a $650 item missing. I double checked all locations that it could be and was unsuccessful. The only way it would have gone missing was if someone had opened the lid to see what was inside.
I went to the office and informed them of the missing item, how unhappy I was with the whole situation and that I will be leaving within a months time and returned the unsigned lease agreement. I was told by the assistant manager that they will be speaking with the maintenance supervisor.
Later during the week, I received an email confirming the $650 item was seen by the maintenance manager and that he was unaware of where it had went. It also mentioned that they will be replacing the missing item. The email also stated that they were unable to provide a month to month lease. I requested a tracking number and provided a detailed description of the missing item and where to purchase it online (how were they going to replace it when they don't even know/ask for the details?). This was a few days ago.

I am curently tired of this whole experience and just need some expert advice. I'm planning to move out by the end of March.
-I did not sign the lease agreement for the new apartment. Will the old lease apply?
-What will happen if there is no lease agreement between both parties?
-They stated that the maintenance supervisor saw my missing item. Should I file a police report?