Plz help me

Sir,I've a honor Holly mobile.It is in good running condition.But the battery of the mobile i's not working.I live in coochbehar district,west Bengal.I searched most of the leading mobile shop for a battery but in vain.Even there is no service centre of honor mobile in our district.
Would you please let me know how could I get a battery for my mobile?
With regards,
Ashis Sarkar
14/8/21