Unable to receive calls

Hello friends I got an issue, my z10 I can make calls but unfortunately I can't receive any incoming calls and automatically there will be a message sent from my phone to the number whom called saying 'I am busy and I will call you later ' something like an automated message sending.. I tried but couldn't figure it out .. ?

Danossh7

Have you checked your call forwarding? In the phone app, swipe down from the top and tap on the settings (top right). Go into call forwarding settings there.