Apex domains cannot have CNAME records.
Question and response
Question
dig phantongourmet.com. NS
Answer
phantongourmet.com. 3 NS ns-826.awsdns-39.net.
phantongourmet.com. 3 NS ns-1668.awsdns-16.co.uk.
phantongourmet.com. 3 NS ns-1573.awsdns-04.co.uk.
phantongourmet.com. 3 NS ns-844.awsdns-41.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0