Apex domains cannot have CNAME records.
Question and response
Question
dig icomplex.com.ua. NS
Answer
icomplex.com.ua. 3 NS ns2.uahosting.com.ua.
icomplex.com.ua. 3 NS ns1.uahosting.com.ua.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0