Flipkart — Invoice has wrong serial number.

Address: Srinagar, Jammu and Kashmir

OD[protected]
The serial number of my Apple Pencil 2nd generation on the invoice doesn't match the serial number provided on the box of the product.
I have sent the pictures of the box with the serial number to [protected]@flipkart.com too.
I was promised that the issue will be resolved by 13th August. But it was not. Now the issue is still getting delayed to 17th.
How can the someone print a different serial number? Maybe the seller doesn't care and just writes down a random number as Apple products always have Alphanumeric serial numbers.
Maybe I was given a refurbished product that's why they didn't provide me with the real serial number.
I just want the invoice with the serial number of my actual product as is my right.