Bad Customer Service and Faulty items Sold

Good morning. I have purchased a 18 kg Kelvinator Twin Tub Washing machine from Lewis Stores Brits Branch 511/ JD Group last year January. Four (4) months after purchase the spin started to makes a high pitch noise. I informed Lewis Stores about it immediately. They only send someone out in August 2018 to fixed it after I have complained at store and then later at JD Group Head Office. I then threatened the Branch Manager with attorneys and the store manager's response was"I don't care do what you want to do." A month later the same problem. They send someone in November to fixed it. On 27 December 2018 the spin stopped working and is not turning. I am so fedup and now paying a monthly installment of R500 and can not use my washing machine. They do not want to swop it as what the customer care centre said they must do. Please help me. They picked up the machine for repairs on 8 January 2019 at 08h40 again for repairs. I can't pay for faulty machine what will happen if the warranty expires then I had to repair it at my own cost.