Poor Service from Acutts Property

I have been renting through Acutts Midrand for a period of one year and I complained about the stove not working for 8 full months. What they did was to bring me hot plate and they claimed that they will attend to me, every time I call they tell me that they are still trying to get hold of the landlord. Am getting frustrated as no one is helping me in any way and I have sent them so many emails to prove. They do not want to refund me my deposit or let me use the monthly rent money to buy another stove.