U3421WE, cracks appeared, popping sounds

I am writing to express my dissatisfaction with the service I have received regarding my purchase of the Dell U3421WE on March 11, 2022. In January 2023, just a 10 months after the purchase, I noticed strange cracks on the screen, even though I had never moved the monitor from its original position. Additionally, since the purchase, the monitor has been making popping sounds similar to thermal expansion and contraction, especially during the evening. I reported these issues to Dell's technical support on WhatsApp at +852 5923 1268 and provided multiple photographs, but no one ever came to inspect the monitor <Dell does not do onsite service for Monitors. You provide picture proof of the monitor issue. DELL-Admin>. Instead, I was simply told that the damage was caused by me. However, I have never touched or mishandled the screen, and I feel extremely frustrated and powerless. The service representative I spoke to at that time was unwilling to come and inspect the issue <Dell does not do onsite service for Monitors. You provide picture proof of the monitor issue. DELL-Admin>, insisting that I was responsible for the damage. This has left me very troubled. Furthermore, there has been no follow-up on this matter or any apology extended to me. Moreover, since March 2023, I have been continuously reporting another issue with the monitor via WhatsApp. The problem lies with the unstable quality of the power connector, as sometimes the screen abruptly shuts off with even a slight touch when plugging in the USB power. I have been reporting this problem since March, but due to the overlap between your working hours and my office hours, no one follows up after I finish work. The next morning I have to repeat the issue and provide photographs again. Every time the issue is resolved within two to three days, my case is closed, and then I have to start the reporting process anew. I have made more than ten repeated complaints (each response time is documented in the WhatsApp conversation), and only recently did someone start to address the problem. However, on October 25, 2023, a phone agent from mainland China contacted me, claiming to be a customer service representative, and from the beginning, she told me that my warranty had been voided due to the crack that appeared in January. I am now formally lodging a complaint regarding the customer experience I have had with Dell. Firstly, regarding the crack on the screen in January, you did not conduct an on-site inspection <Dell does not do onsite service for Monitors. You provide picture proof of the monitor issue. DELL-Admin> and simply concluded, based on a single photograph, that I had caused the damage, automatically voiding the warranty. This lacks evidence and proper inspection service. Secondly, if the warranty was already voided at that time, why did you repeatedly ask me to take photographs for evidence in the ten repair requests I made from March to October 2023? If the warranty was voided, why was I asked to provide photographs, and why were my cases closed after multiple months of reporting, only to start again? This has caused me significant distress and inconvenience. Thirdly, when phone agent from mainland China contacted me, she had no understanding of my situation and immediately informed me that the warranty had been voided, without providing any customer service. This has left me extremely disappointed. This customer experience has been highly unsatisfactory, especially considering the assurances I received when purchasing from Dell that Dell has excellent customer service, including on-site repairs and inspections <Dell does not do onsite service for Monitors. You provide picture proof of the monitor issue. DELL-Admin>, which have not been fulfilled. I strongly urge you to address this complaint promptly. If I do not receive a satisfactory response.