Battery replacement on brand new watch

I am writing to formally raise a concern regarding a watch I purchased on 26 November. The watch has never functioned since the date of purchase, and due to personal circumstances, I was only able to return to the store today to have the issue addressed.

Upon visiting the store, I was informed by the sales consultant that the watch requires a battery replacement and that I would be responsible for the cost. I provided proof of purchase, including the confirmation email showing the purchase date, however I was advised that free battery replacements are not offered.

I am concerned by this, as the watch was sold to me as brand new and has never been operational. It is my understanding that a new watch should be supp**** with a working battery and be fit for purpose at the time of sale. Requiring a customer to pay for a battery replacement on a watch that has never worked raises questions about product quality and consumer rights.

I would appreciate clarification as to why a brand-new watch would require a battery replacement and why this cost is not covered, given the circumstances. I kindly request that this matter be reviewed and resolved appropriately.