Apex domains cannot have CNAME records.
Question and response
Question
dig abfsingles.com. NS
Answer
abfsingles.com. 5 NS ns-2009.awsdns-59.co.uk.
abfsingles.com. 5 NS ns-1806.awsdns-33.co.uk.
abfsingles.com. 5 NS ns-583.awsdns-08.net.
abfsingles.com. 5 NS ns-2016.awsdns-60.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0