I have domain with enom and my registrar is not responding , I was updating DNS and getting this error : nRRPResponseCode 541 and even now i cant enter my previous host DNS which i was using i dont know what happened and whom to contact , my provider is not responding.
Error 541 means "Invalid Attribute Value." Are you entering just the nameserver names? Any typos? Is that all that you're changing? Are the nameservers registered in the registry where you're trying to use them?
If you're properly spelling the names of nameservers registered in the registry for the domain you're trying to update, then it's likely a programming issue with your provider. Not knowing the domain or nameservers makes it tough to provide any more specific analysis. And, no, I'm not affiliated with eNom.
iam using .com but if its low rate in .net i can go for that as well all my concern is i dont want to pay consulting fees to domain registrar if managed vps can do it for me in less money by just registering it
If you got your domain name through your VPS provider, they can essentially charge extra depending on their business model.
OTOH, if you got your domain name separately from them, log inside your domain name account and see if there's an option to register those "parent" nameservers (e.g. ns1.yourdomain.com with IP address). Ask them if need be.