I'm unable to import my contacts in iCloud, attempted in systematic way but there is an issue in updating of all contacts. please can you you help me out in this regards.

There is no way of transferring contacts from one email account to another.

Contacts are neither stored locally on an iPhone nor in SIM. They are synced to an email account that you had Google, iCloud, AOL, Exchange, Outlook, Yahoo or any Other

If Contacts on iCloud, try this --> Restore contacts, calendars, bookmarks and more using

You do not need to import them.

Go to settings, tap on your name, tap iCloud, turn contacts on (green)

That’s it,