Dell India — Already purchased laptop given

I bought dell inspiron 5410 from dell exclusive store, amarjyothi layout, Bangalore on 31.01.2022. But on entering express number, it said purchased on 22.12.2021 and warranty was already activated with expiry on 23.12.2022. How is this possible ?
And on enquiring, store executives are giving me excuses.
Brand new laptop is continuously hanging from the day I purchased for which store people are blaming it on windows 11.
Kindly look into the matter.
Would be forced to take legal action if this is not addressed