Microsoft Corporation — MICROSOFT Office Home and Student 2019, One-Time Purchase- Lifetime validity, 1 Person, 1 PC or Mac, (Activation Key Card)

I purchased above product from Flipkart. When I tried using the product with by Macbook, it did not work. I got the message 'This product is not licensed to this e Mail ID'. The e mail ID was the one with which I had registered the product.
I tried contacting Flipkart but they refuse to entertain my complaint. I am looking for a working product or a refund of my money.