Apex domains cannot have CNAME records.
Question and response
Question
dig tharebalhayat.com. NS
Answer
tharebalhayat.com. 5 NS ns-376.awsdns-47.com.
tharebalhayat.com. 5 NS ns-1910.awsdns-46.co.uk.
tharebalhayat.com. 5 NS ns-1902.awsdns-45.co.uk.
tharebalhayat.com. 5 NS ns-1809.awsdns-34.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0