If your Xbox One Wireless Controller has a malfunctioning thumbstick and you cannot properly navigate around your Xbox One, see the Xbox One Wireless Controller Has Malfunctioning Thumbsticks problem page for possible problems and solutions.

You may need to replace the main thumbtack controller modules .

These are cubed /boxed type module with several soldering points which connect to the board itself .

they can be found on EBAY if no luck here, I will add that the solder points are small so a thin point solder iron and fine solder reel will be required also