NON REFUND OF DEPOSIT

I recently moved out of an apartment that I leased through Just Letting. Over two weeks have passed and my deposit has not been refunded to me instead Just letting has now found a lot of things that have to fixed with my deposit some of whom were never taken care of when I moved in. Further now they are claiming that the ingoing inspection pictures were lost despite the fact that I requested them immediately after the inspection took place.The service I have received from just letting has been nothing but appalling and I still have not received my deposit from them.