Exposed to asbestos due to negligence in housing assoc flat need advice?

i live in a housing association property and 3 weeks ago workmen came and smashed through panelling containing asbestos . the debris of this was left strewn and crumbled for days in the hallway i had to get an mp and enviromental health to get the debris cleaned and tested. results came back as amosite asbestos. wish to take matters further but not sure what to do, please help