I just want to delete my site in DNS ZONE from my.quic.cloud/dns/zones

I can't delete my site in the DNS zone of https://my.quic.cloud/dns/zones.
My site remains offline.
I went to my server, I put my server DNS back as before but it still points to RAPIDE cloud's custom DNS.

I just want to delete my record in DNS ZONE. keep my old settings.
Please help me.

The page I need help with: [log in to see the link]