Mivi — Mivi Duopods M20 True Wireless Earphones not charging

I purchased the earphones through Flipkart with a year warranty on 23rd April 2022. The earphones stopped charging on 27th June and I send an email to claim my warranty. The responses has been so slow and they told that they will pick up the product but no other details been shared. Last they replied was a month ago and I have been sending follow up emails but no response. Nobody picks the customer care number as well.