You were a victim of a spoofing attack. You may want to contact Amazon and report it. You may want to check you computer for Trojan Horses or viruses
Report Spoofed E-mails to Amazon
As part of our ongoing commitment to stop spoofing, we’d like you to help us investigate spoofed e-mails. Please send us the original spoofed e-mail with the complete header information using our contact-us form:
https://www.amazon.com/gp/help/contact-us/report-phishing.html
One of our guys in the office fell for the “your computer is infected click here to update your virus scan and delete this virus” scam. I always wondered what these viruses did and after he clicked it it just took over his machine. It shut down his own virus scan, you could not do a restore to a day or two earlier, you couldn’t get into task manager to close it, and it kept asking him for a credit card to pay for the update to the virus scan so the virus could be removed. I am no dummy around PC’s and it was just amazing how it took over his PC. We did a complete restore on it - wiped it clean.