touch id has stopped working on iphone 6 .......iphone unlock .itunes App store .App pay and password auto fill have all turned off and will not open manually ..........Any suggestions ?

Make sure that you have the latest version of iOS or iPadOS. Make sure that your fingers and the Touch ID sensor are clean and dry. ... Go to Settings > Touch ID & Passcode and make sure that iPhone Unlock or iTunes & App Store is on, and that you've enrolled one or more fingerprints. Try enrolling a different finger.

If Touch ID isn't working on your iPhone or iPad - Apple Support