My iphone has duplicates for every single contact, please help me remove duplicates

You may have stored the same contacts in multiple email accounts.

Either remove the contacts from the rarely used email account or disable contacts from the rarely used mail account in the iOS Mail app.

Unlike some Android devices, 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

My iPhone has taken my Outlook contacts and entered them about 10 times each. How do I fix that please? These are Al. Necessary contacts