DNS ISSUE - Nameservers

Hello, Example.com hosted in another server and using yandex dns services. Example.com - Domain registrar nameservers created ; NAMESERVER 1 : ns1.example.com NAMESERVER 2 : ns2.example.com And yandex dns service a records created : NS1 : EXAMPLE ?P NS2: EXAMPLE ?P Nameservers ping ok but not working web sites. cPanel ticket support very slow michael please help this topic. Regards.