Cockroaches infestation before moving in + water damaged unsafe balcony
My partner and I signed a lease to an apartment that had preexisting cockroach infestation we were unaware of. Took the keys July 2 in the night, walked around and saw glue traps already there but didn't have time for more than a walk around. We also discovered a major safety concern in the balcony and water damage causing soft flooring and loose railing; this was our initial major concern.
The following day, July 3, I went in with cleaning supplies to wipe down the kitchen, closets and do a nice clean up before we start moving our things in. Checking the kitchen meant checking the traps and there were over a dozen roaches in the traps, some were nymphs and clearly tiny, there were roach egg sacks, droppings and diatomaceous earth in the dishwasher, the floors and all around the kitchen. This is from the property manager, prior to our inspection.
Speaking with tenants this building has a long history of issues whether it be mice, bedbugs or water damage leading to serious physical injury.
We have somewhere to stay. We were not informed of the infestation. We have a storage unit for our belongings. We are not going to habit this apartment.
We have notified the landlord July 3 noon of the balcony and a detailed notification hoping for a mutual resiliation of the lease around ~6pm. Attached videos of the balcony, the roaches and their traps.
We are not going to move in. What paths are available to cancel my lease?
What is the most effective course of action?