Help getting out of a lease

I have a wolf spider infestation. I have recieved numerous spider bites and they are everywhere even in my bed! The problem has been going on since the begining of September. I have attempted to contact my landlord on numerous occassions. I was finally able to reach someone the begining of last week. They agreed to come out and spray and even had me leave work to put my dog in her crate so she didn’t get into the spray. They never showed up, never called, and are refusing to return my phone calls. I also have numerous maintenance issues including a storage shed in the back of the house that is still filled with trash and junk from the previous tenant. They agreed to clean that out, fixed warped boards on my deck and install weather stripping on the doors where it had fallen off the day I signed my lease. None of this has been done and I’ve lived there since Aug. 1. I understand that maintenance issues are not cause for lease termination but the safety hazzard with the wolf spiders must be. What can I do? I want out!