Boult Audio — Right side ear buds not charging/working

On 12 August I purchased ear buds pair from amazon .But i m getting trouble in getting my earbud charged.one out of two earbuds i m unable to get charge the same.kindly replace my earbuds as early as possible because it is under warranty period.

I shall be highly obliged to you i[censored] will do me a favour.

If company fails to replace my purchased item i would seek remedy from consumer forum.