My itunes for iphone is rejecting all passwords correct or wrong, any ideas why?
Not without answering your questions. If you can't remember your answers then you will have to contact Support in your country to get the questions reset.
Contacting Apple about account security : Contact Apple for help with Apple ID account security
If your country isn't on that page then try this form to contact Support : https://www.apple.com/emea/support/itunes/contact.html
When they've been reset you can then add a rescue email address for potential future use : Manage your Apple ID primary, rescue, alternate, and notification email addresses
Or if it's available in your country you could change to 2-step verification : Frequently asked questions about two-step verification for Apple ID