I had been wronged by Lewis store in Kuilsriver

I am miss G Carelse and I would like to complain about a 18lt Kelvinator top loader washing machine that I had bought on the 22nd of November 2021at Lewis store in Kuilsriver. I've paid in cash and I got excellent service that day. Less than 10 weeks later it broke while my mother was spinning. The wet clothes was stuck inside and it didn't wanted to open. We reported it the next day and we were told that it will be sorted out. But only 4 days later the store booked it in for repairs. The fifth day a technician came to see what the problem was and he did not even bring any tools along to get the clothes out. On the 7th day he came back to open it and some of the clothes was spoiled, our children's school clothes was also stuck inside and because of not wearing proper uniforms they were send home and that whole week they couldn't attend school. I send an email to there head office but till this date I have not received any response from them. On 14th February 2022 the technician came and replaced the computer board and he test if it will spin, so it did, but how do I know that it won't give me further problems since it was still new. I'm very upset because of the delay on there side, hence the fact that the clothes was spoiled. I feel that I incurred a loss and that I could've used my money else where if I had known that the after service would be so bad. Can someone please assist...