Net4.com website is working and its accepting payments also but all its services are down as company operation are closed due to insolvency and many customers are suffering due to this. If you want to renew or register new domain please do not do it on net4.com as company is still accepting payment but services are not running so you will not be able to change name servers. Please read this news.
https://kalingatv.com/state/indias-largest-domain-company-net4india-closed-millions-of-customers-are-worried/