Unknown caller abroad

[Samc1975]

Hi. Since landing in Tenerife on 9th August every incoming call has shown as unknown caller. I did change my SIM card about 3 weeks ago as I renewed my contract. 
but everything was working fine until I landed in Spain. 
I have been in contact with o2 both on the phone and messages for over a week. I been promised on numerous occasions that the problem is now fixed and will take 24 hours to kick in. But nothing has changed. 
Any help would be appreciated as I have lost patience being passed from pillar to post with no results. 

[jonsie · Accepted solution]

A very common issue we have had especially changing tariff or when changing sim cards

We are all just customers in the community

You need to contact O2

Use social media by clicking the link just below this message or call 202