Hi Lupita-
Do you know anyone who would sublet the apartment for a month,perhaps at a lower price (someone who wants to visit your city, for instance?) You could also try complaining about code issues (electrical, plumbing, heating, painting etc) - often the landlords will be happy to rid themselves of you...if not, you can inform the local Housing officials and see if you can move without paying legally, due to the condition of the apartment (be sure to get a case number and the approval to move in writing.
Barring any options that could relieve you from the $800.00, if you are planning to stay in your new home for a long time , you can think of it as an extra $5.00 per month, etc cost for a wonderful new home.
Best to you Lupita,
Changing