Amazon India — aboutthefit 5000 mah portable rechargeable extended battery pack protective cover for apple iphone 6s/6 4.7 inch

I have ordered aboutthefit 5000 mah portable rechargeable extended battery pack protective cover for apple iphone 6s/6 4.7 inch (Black) from amazon on 28th november 2019. But product not yet delivered. I have contacted amazon and seller. Seller is form china they dispatched product but it got stuck in customs. I have provided all details which they requested and what they have asked but product not yet deliver even amazon and seller couldn’t track product. I have around 10-15 email transaction with seller and amazon about product delivery request or refund. But they are not taking any action. Now i need my refund plus penalty and they should ordered new same product and get it delivered asap as they have used my money more than 3 months.