Apple watch not working

Hello.. I am from Bangladesh, i have purchased an apple watch (serial # H4***1RG). currently it is not working. i have taken it to the nearest iPhone center for support, they informed me that it has faulty battery and it needs to replaced. In my country there is nor service center of Apple where they can provide me such support.

Now please help me out by letting me know that whether this watch has warranty period or not? if it is under the warranty period then please let me know how can i get proper support.

Regards... Farhana

[Edited by Moderator]