Unable to add domain to netlify

I am trying to add a domain to a netlify site app (sciafrika). However, it is not working. I am getting this error:

name sciafrika.com has a conflicting custom domain in another account

I believe the reason is because another person working on the app before me (I don’t know the person) already tried using the domain for an app on netlify. I am unable to add the domain now.

I would appreciate if anyone can help me fix this.

I have added a tag to the record on namecheap with the name: verified-for-netlify and the value which is the link to this post.

Thank you

Thanks for making that TXT record, I’ve removed the domain from the other site. You should be able to successfully add it to your account.

Thank you so much.

I am getting this error again:

A DNS zone for this domain already exists on NS1, the DNS provider backing Netlify DNS

Please contact Netlify Support with the domain name so we can initiate a support case with NS1 on your behalf.

The DNS zone has been removed for this domain at NS1, you can now proceed with creating a Netlify DNS zone.