DNS Name server ns1.epizy.com ns2.epizy.com not working today on 07/08/2018

Yesterday my domain www.dyfigiveblood.xyz worked correctly now showing DNS server name problom the same dns name server ns1.epizy.com ns2.epizy.com used but today the problom arised . what i do

The site seems to be working fine from here. What do you see exactly when you try to open the website?