calls to me answered by someone else??

[meme1]

Help! When i have inbound calls my phone stops ringing after 3 rings. Today I called the person right back and they said it went through to someone else who didn't know who they or I was! Why is this happening. I've had the number since 2010! How can I talk to someone at 02 about this?

[MI5]

@meme1 

Start by dialling ##002# to cancel all diverts.

Then look at your voicemail setting options Guide: All you need to know about O2 Voicemail 901