Forgotten touch ID and pass code?

My friend played a prank on me, she locked my phone and change my touch ID on my iPhone 6. Asked her what's the pass code but she forgot she was to "DRUNK" to remember ugh! So since I didn't have a computer I had to use my friends iTunes to restore but unfortunately I can't use it because it requires my touch ID. I don't know what to I tried taking in and it cost me allot to JUST GET A NEW IPHONE because they can't unlock my iPhone 6 unless I call apple store. Please help I used the iTunes and the wire that comes for my iPhone to restore my iPhone but I can't do anything any suggestions please.

Enter DFU mode:

Plug your device into your computer with a USB cable.
Turn off the device.
Hold the Power button for 3 seconds.
Hold the Home and Power buttons for 10 seconds.
Release the Power button but keep holding the Home button.
After about 15 seconds you will be alerted by iTunes saying that it has detected a device in Recovery Mode.

Once iTunes has detected that it is in Recovery Mode, you will get the option to restore your device. You will lose everything on the phone unless you have previously done a backup via iCloud.

You should be able to completely reset the phone, but you ll lose everything on it. Current iPhones encrypt all data locally using the passcode, which means that if you lose the passcode, you ll never be able to get to your data on the phone, and Apple can't help because they don't have your passcode.