Apex domains cannot have CNAME records.
Question and response
Question
dig shoppingkingz.com. NS
Answer
shoppingkingz.com. 2 NS ns-61.awsdns-07.com.
shoppingkingz.com. 2 NS ns-1937.awsdns-50.co.uk.
shoppingkingz.com. 2 NS ns-1560.awsdns-03.co.uk.
shoppingkingz.com. 2 NS ns-881.awsdns-46.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0