Hi, good day!
Please try to check your purchase records, sometimes the product key is in your order confirmation email, depending on where you bought it.
The store where you purchased it should be your first stop. Have proof of purchase ready (receipt, photos of the damaged card, order ID). They may be able to verify and replace it.
I look forward to receiving your update and I'm willing to collaborate with you till we resolve the issue. Do keep me informed by clicking "Add comment" below.