@noura It looks like you have an inactive DNS zone:
See this Support Guide:
https://answers.netlify.com/t/support-guide-how-to-detect-and-fix-inactive-netlify-dns-zones/21742
Running dig voltagebright.com NS +trace | tail -n 6 I see:
As it says in the guide:
What does the answer above show? It shows that the Netlify DNS name server record (NS records) did get sent. However, the “Received from” line shows that those name servers were not the name servers that answered for this production domain.
The guide contains the steps to fix.