Boat — Airpods441 warranty

I purchased airpods 441 on October 2020.
And it has some battery issue so i registered for replacement of the defective product.
I registered the complaint on 26 may 2021. And i didn't got any update after that. I wrote many mails but didn't got any update or reply on that too.
Called the customer service multiple times but no help was provided.
It has been worst experience ever.
Will inform all my known about the same.