Dell Computer buyers, BEWARE. But a different brand

I Purchased a high end notebook in February 2019. I had connectivity issues in the first three months. I took the computer in and left it there To be repaired. I received my notebook two weeks later and the problem persisted. This continued until December 2019 whereby a Dell representative finally came to my premises and inspected the computer and detected a faulty motherboard. He replaced the motherboard with a brand new one and left. Three months later (March 2020) the exact same issue started happening again. I sent 5 emails explaining the problem and had no response. I then called support and was told that the notebook was now out of warranty and there was nothing they could do. I explained that the warranty should cover the new part (now only three months old) and they insisted it would not be covered. I am now left with a very expensive paperweight, my computer can not connect to WiFi