Boat — Claimed my warranty but they are not responding

I had claimed my warranty on 16july and pick up was done by their logistic partner blue dart on 18 July.After taking 11-12 days, On 29 July they are saying that my one of earpiece was damage.They told me that I have to share proof of delivery then after requesting to their logistic partner i shared.After that they told me to forward a mail taking from their logistic partner blue dart, I also done this but after all this also their is no response.
I want to know if anybody's product was damaged then also pick has to be done.If it is so then in written they provide me.