Unfair treatment

I was renting a Unit with De Lucia from 2014 and I never gave them any problem,I moved out end of Feb 2018 and when I request my deposit back, they sent me invoices that they fixed the Unit which they claim I am responsible for. I moved into the Unit and the Unit was in a bad state,I sent them emails to tell them what was broken,I even cleaned the carpets myself which was so dirty, now they are penalising me for things I didn't do. When i complained about the state of the Unit when I moved in, nobody responded to my email. I can understand pet control only but the rest I'm not responsible. I call this a ******* and I'm not pleased with the service.