Unable to Make calls/or access voicemail

[AJPoppies]

Unable to call out on my mobile or even access the voicemail service since Monday morning

I put in an O2 service network report on Monday and no faults were reported in the area

My Account is up up-to-date

Restarted my mobile

System Software is up-to-date

Taken sim out/put back in

I've reset my network status.

Done a virus and malware check, nothing found 

Deleted unused apps where necessary.

I can receive calls, but they won't direct to voicemail as tried and tested.  I can access the internet/email, send texts, etc.

Can't ring O2 as I can't ring out.

At a bit of a loose end really...any thoughts anyone?

[MI5 · Accepted solution]

@AJPoppies 

If you message O2 on Facebook (https://o2uk.co/O2CFB) , Twitter (https://o2uk.co/O2CTW) or Instagram (https://o2uk.co/O2CIG) , they should be able to help you with this.
or call using Skype Guide: A Guide to Skype 

[AJPoppies]

Thank you, in the process of messaging them now 👍