unable to update purchase date

Hi there kshitiz33,

If you're unable to update your purchase date, you'll need to contact Apple Support directly by phone.

To update your information contact Apple Support by phone. Tell the advisor that you need help with your Apple Limited Warranty or AppleCare plan expiration date.

Here’s what you need when you call:

- Your AppleCare agreement number 

- The device serial number

- Your sales receipt 

You'll find this information here: Update your proof of purchase

Take care.