App Store and iTunes 'Cannot Connect' Phone Issues

Recently I was setting up an iPhone 6s and upon setting my Apple ID up my phone died, haltingly the setting up process. Once back on, the App Store, iTunes and all of my music and apps that need updating weren't accessible. I tried changing my password through apple but then it refused to sign me in on settings.

I reset my phone again with my new password and all the updates on the phone were successful. HOWEVER my apps, music, iTunes and App Store are still not accessible so I don't know what to do.

Thankyou I would really appreciate any help.