Worst letting agent I have ever experienced

I can honestly say without exaggeration or hyperbole that Braemore are the worst letting agent that I have ever had the misfortune to deal with. When I moved in to the flat a number windows were very dirty. The washing machine then broke and Braemore avoided sorting it out for almost 8 weeks. This was despite my repeated phone calls and emails to Braemore. I informed Braemore that a certain day was inconvenient for them to conduct a viewing - they came anyway and tried to get into the flat. They later entered the flat without my permission. Hard to believe, but after all this when I left the flat they then charged me for 'cleaning' allegedly done by their own company...