Apex domains cannot have CNAME records.
Question and response
Question
dig merchantspackage.com. NS
Answer
merchantspackage.com. 5 NS ns-1728.awsdns-24.co.uk.
merchantspackage.com. 5 NS ns-1705.awsdns-21.co.uk.
merchantspackage.com. 5 NS ns-1136.awsdns-14.org.
merchantspackage.com. 5 NS ns-1238.awsdns-26.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0