My MacBook Air cannot be covered by AppleCare+?

How to buy

1. Purchase AppleCare+ with your new Mac.
2. Or buy it within 60 days of your Mac purchase:

• Online (requires you to verify your serial number)
• At an Apple Store (inspection of Mac and proof of purchase are required)
  • By calling 800-275-2273

For details:

https://www.apple.com/support/products/mac/

I had a similar issue when I purchased mine back in November.

Give Apple Support a call and explain your issue and if needed

ask them to forward your call to a higher level representative.

Apple resolved my similar problem without any issues at all

and got me signed up for it all in the same call.