There should be no other way to complain. Your complaint is invalid and will not be accepted by other departments. Man-made damage can not be protected by the national three guarantees regulations. Manufacturers are the people who stand in front of laws and regulations, because manufacturers have the obligation to guarantee the product failures or quality problems that are not artificially damaged during the warranty period. When it can't be repaired, it can be depreciated, the motherboard can be replaced, and the machine can be replaced. However, it does not promise that the artificially damaged products can be repaired, so the manufacturer or merchant does not have to bear any responsibility.
But from the consumer's point of view, even a small part of a world-famous brand is out of stock, requiring customers to change the whole machine. Such after-sales service should be condemned by consumers!