You posed this question months ago, but never late than never, right? 🙂 I was in your position a few minutes ago, but after vigorous "research" I've found something a bit less radical than restoring your device back to factory settings. The first thing you would need to do is create a backup of your device if you haven't already. After doing so, you need to download a program called 'iBackupBot', it should be the first link on Google when you search the name. After setting up and opening the program, there should be a list in the top left hand corner. Double click on System Files > HomeDomain > Library > Preferences. On the right of the list you just clicked through, there should be a list of files. In the search bar, type com.apple.springboard.plist and double click on said file. A window may pop up asking you to buy the program, just click on 'Cancel' and the desired window should open. In the open window, select the find icon (the binoculars), search for <string>us</string> and under it, there should be a line of code that says </dict>. Click at the end of the code and press enter to open a new line where you are to type <key>SBParentalControlsPIN</key> then type <string>1234</string> on a new line below. When this is complete, save your code and close the window. Make sure that com.apple.springboard.plist is highlighted (if not, click on it once) then click the 'Restore' option. Your device will restart and the code you entered should work.
PS. Instead of '1234', you may enter any four digit code of your choice.
PSS. If your backup is password protected, you need to make a new backup without a password. The program will not allow you to restore with a password protected backup. (I learnt the hard way.)
PSSS. Need I mention that your device must be plugged into your computer?
