PTron — Received damage product

I had purchased 2 ptron power bank from Amazon both were damaged.One Was return from Amazon but since another was a gift for someone the return period was gone.
So I had contacted ptron since it comes with 1 year warranty.
They asked from to buy a new device and share the invoice and after that they will be providing service after that.
For which I had denied as I had alreaDy received damage product twice.
Later they agreed to get the pickup done and when I asked for the replaced product along with that I have not being getting any response on the same.