Incorrect warranty expiration date

I bought my laptop in December 2023, and it has a two-year warranty, meaning the warranty should end in December 2025. However, when I go to the warranty check page, it shows that it ended in March 2023. Why? I have the invoice and all proofs. I contacted support, but they didn't respond at all. Please translate this message into English and phrase it as a formal letter to Dell company.