Namecheap domain, DNS zone conflict at NS1

The netlify site name is https://earnest-bienenstitch-ad68b4.netlify.app/

I did try asking the NetlifyAI followed it’s instructions and i reached out to my domain provider

custom domain is planmyd8.com

the error message i get from the netlify ui is A DNS zone for this domain already exists on NS1, the DNS provider backing Netlify DNS

i bought my domain from namecheap and not name.com.

below is the full sequence of events

1)bought domain in November, immediately pointed nameservers to netlify. this is because i knew i was going to delegate the domain to the project to be later created here

2)Today i try to add the domain using the Netlify UI for verification & delegation, i get the error “A DNS zone for this domain already exists on NS1, the DNS provider backing Netlify DNS”

3)at this point the issue is that i delegated to early, so i delete the Netlify nameservers on my domain provider(namecheap) to restart the process, but the error still persists

4)i have spoken with netlify support and they have assured my the issue is on this side (netlify)

My issue is exactly like the one one addressed here Custom domain - A DNS zone already exists on NS1 where the solution is to delete the phantom DNS Zone

Kindly help me out

Kind Regards

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