I know DAMN WELL I ordered nothing from Norton.
This is a scam. They want you to call the telephone number shown, as in a panic, because they know somebody is going to freak out over being charged $399 for something they’re certain they didn’t order.
Then, they’ll work you if you’re a chump.
DO NOT CALL THAT NUMBER. THEY DO NOT YET HAVE YOUR BANK ACCOUNT INFO, BUT THAT’S EXACTLY WHAT THEY’RE TRYING TO GET.
THESE PEOPLE ARE THIEVES!
Here’s a scam foiler having a go at these thieves, twisting their beak.
I have reported this to Google gmail as spam, and blocked the sender.