What they did is NOT legal, I'm just not sure what recourse you have. At the least it should be clearly understood now that they are not to enter without explicit permission. If your apartment is part of a complex owned by a large management company, definitely write that company, and save copies of all correspondence.

They should be so sorry for the trouble they've caused you, don't they have a heart? Did they not see the cast for so long? I hope you can get out of there soon you and Graham deserve better!!!!!