Samsung Galaxy Note 2 — How to un-link and delete duplicated contacts all at once?

Ok ... Press: Phone > Contacts

Up come my contacts, but to the right of the majority of them
are 2, sometimes, 3 different icons.

Press one contact with 2 icons pulls up the contact. Under
"Connection" are 2 icons, & to their right a double-link chain.

Press the double-link chain shows me that this contact is linked
to "Device" and "GeeVee".

I don't like that GeeVee has done this, but what I can do is
manually unlink GeeVee by pressing the minus ("--") sign
to the right of the GeeVee link & confirming the separation.

However, after separating the contact, I now have another,
GeeVee contact in my contact list in addition to the one
in my device.

How annoying!

I can delete this GeeVee contact, but I've got a lot of contacts
- almost 300 - and going through this one-by-one is going
to take quite some time.

Does anyone know of a way to separate all contacts at once?

And then delete the contacts created by a downloaded app
all at once?

Instead of having to do this one at a time?

Thanks!