Willard battery warranty

I bought a Willard car battery in 2021/03/06 at Autozone Bushbuckridge Mpumalanga and it is dead now, i went to the shop to enquire about the warranty and i was told it had exceeded the 1 year six month warranty period of which online it is stated that the warranty for Willard battery is 25 months, I'm finding it difficult to understand why is there so much difference and i am currently distressed as i am not mobile due to the battery issue, can someone please urgently assist as my current health condition require a fit vehicle 🙏😢