Contacts imported from outlook got merged automatically
I bought a iphone 12 mini and I added my microsoft account to it. I am moving from an iPhone 7. My contacts were appearing perfectly fine in my iPhone 7.
I had moved to the iPhone 7 from a Lumia 920 and all my contacts had come into the iPhone 7 by just adding the microsoft/outlook account. So I did the same here and yes all my iPhone 7 contacts instantly appeared in the iPhon12 mini. However, some time later or immediately thereafter (I don't know when), some of my contacts merged with one another.
For eg I had a person named Nikhil and a different person named Nikhil Khandelwal who were two different persons. They got merged into a single contact.
I went to the edit contact button to see if they got linked in which case I would simple remove the linking but it doesn't show any linked contacts there.
I checked my iPhone 7 and the contacts have got merged in my iPhone 7 as well.
I checked my outlook account by logging in and the contacts have got merged there as well.
In none of the places am I getting the option to unmerge or unlink the contacts and they appear as a single contact only.
How do I undo this entire process? I don't know whose number is whose now and I dont want to call everyone up to verify this and save new contacts.
iPhone 12 mini