Apex domains cannot have CNAME records.
Question and response
Question
dig calvarychapelgb.com. NS
Answer
calvarychapelgb.com. 4 NS ns1.calvarychapelgb.com.
calvarychapelgb.com. 4 NS ns2.calvarychapelgb.com.
Authority
The response has no authority records.
Additional
ns1.calvarychapelgb.com. 4 A 107.172.113.19
ns2.calvarychapelgb.com. 4 A 125.253.122.16
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0