While you have set the Cloudflare nameservers at your registrar, your registrar has not set them at the .kg registrary. Contact your domain registrar to get it fixed.
dig +trace +nodnssec eux.edu.kg ns
; <<>> DiG 9.10.6 <<>> +trace +nodnssec eux.edu.kg ns
;; global options: +cmd
. 518192 IN NS a.root-servers.net.
....
. 518192 IN NS m.root-servers.net.
;; Received 239 bytes from 127.0.2.2#53(127.0.2.2) in 0 ms
kg. 172800 IN NS kg.cctld.authdns.ripe.net.
kg. 172800 IN NS ns.kg.
kg. 172800 IN NS ns2.kg.
;; Received 245 bytes from 192.5.5.241#53(f.root-servers.net) in 71 ms
eux.edu.kg. 1800 IN NS NS58.DOMAINCONTROL.COM.
eux.edu.kg. 1800 IN NS NS57.DOMAINCONTROL.COM.
;; Received 94 bytes from 195.38.160.38#53(ns2.kg) in 132 ms
eux.edu.kg. 3600 IN NS ns57.domaincontrol.com.
eux.edu.kg. 3600 IN NS ns58.domaincontrol.com.
;; Received 94 bytes from 173.201.76.29#53(NS58.DOMAINCONTROL.COM) in 24 ms