Lenovo complaint: laptop

I purchased a Lenovo Y5070 laptop, considering that it is a large and specialized company. During use, I noticed a very slow device, and I took all possible measures to solve the problem. I contacted customer service via messenger through the official Lenovo page, and they tried to help me more It took an hour to solve the problem, but all these attempts failed and did not bring any positive results…. Therefore, I submitted a complaint to the Lenovo customer service via e-mail, and a senior official responded to me that the Lenovo devices have a shelf life of only 5 years and that the laptop Top is out of warranty. .. And the question here is, do Lenovo laptops really only have a shelf life of 5 years, and why did you not tell me the expiration date of the device when buying it…. I am very upset with this company and I will not deal with them or advise anyone to deal with them… I am asking Refunding the money I paid or giving me a new laptop …. Attached is a photo of the serial number of the device and a screenshot of the message that the official in the company sent me