Unfair default of warranty.

On may 2025 i purchased a Sony Sound bar ,then November 2025 returned store because it stopped working , for 3 months no update nothing even subsequently visiting the store.the on the 13 of February 2026 I went to the store that's when they told me that it's damaged by the surge and can't be fix and The warranty is null and void. Called head office about the issue there were no help ,they told me the store must handle it..they want me to pay for courier for the speaker to come back to the store unfixed