1. Go to the contact's profile page or the contact sidebar view
2. Enter into Edit mode (from the top-right on the contact profile, or under the menu in the header of the sidebar).
3. Decide what your final result will be.
For example, if two contacts were inaccurately merged, you'll likely want to create a separate contact for the second one. In this case, you'll need to preserve the information before you delete it from this contact.
You can do this by copying the second contact's information to a blank document on your computer, or opening another browser tab with Contactually and copying/pasting the second contact's data into a new contact record on that tab.
4. Remove the extra data from the original contact record so that the record has data for just one contact and save your changes.
Unfortunately, email conversations inaccurately logged for a contact will not disappear from the contact record even once the inaccurate email address is removed. If you create a new contact record for the other contacts with their correct email address(es), all future email conversations will log under those new contacts.
Notes and logged Interactions inaccurately logged can be manually deleted. They will not automatically transfer to the correct contact. You can manually add them to your new, corrected contacts as necessary.