Samsung not a good brand anymore

We bought our 15kg Samsung top loader in July 2024. Ever since we started using it there has been endless problems. I called the customer care center a few times and each time they do not want to send out a technician and instruct me to clean with baking soda and vinegar eventually after a few months I wrote a Hello Peter complaint and technicians have been sent out. The technicians have been here 3 times already to replace parts and every time the problems persists then they come out and replace the same parts with another new one. The problems are all of our black clothes look terrible after a wash, full of white marks and different stuff, the machine will reach the spinning time then it will move like crazy even though there isnt a lot of washing in the machine then stop and go back to rinsing and come to spin then go crazy again and go back to rinse, there marks on most of our clothes after a wash and it damages our clothing. After having the techs replace parts on 3 different occasions and the problems aren't being fixed, I deserve to either have my machine replaced with a brand new, working machine or my full refund back as you aren't able to fix your own machine. For a premium brand like Samsung I am extremely disappointed in the quality of your products and your parts.