IPhone 6 no longer starts and is not displayed on the laptop with iTunes, need help with iCloud and data backup?

I need your help my friend's iPhone is causing problems, but she urgently needs contacts that were saved on the phone.

Is there a way to access icloud contacts that were saved on the phone?

The next problem my girlfriend no longer knew her data in the cloud so she reset the password, but she no longer knows the answers to the security questions and they can't be reset. What options are there now to get the contacts on the cell phone?

Very simply made: No.