Deleting contacts off an iphone?

I bought a second hand iPhone and I deleted all the contacts but when I'm writing a message an you type in the top who you want to send it to it still comes up with the other womans contacts and they don't come up when I look in my contacts only when I'm writing the message how do I delete them fully? Xx

In settings, general, choose reset. Then choose erase all content and settings.

This will nake the phone like new; fresh out of the packet.

When you sync it with your iTunes, it will put everything back so make sure your contacts are upto date on your computer.

Connect the iPhone to iTunes on a computer & use the Restore option. Wipes everything off to make it as if it was fresh from the factory.

The seller should have done this herself. Smh.

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