Unable to make or receive calls while abroad

[Lillibet]

I would like to know WHY I cannot find any access to speaking with an actual O2 agent. This is not on. I am abroad somewhere where I come four times a year, yet this trip my phone has stopped enabling me to make or receive calls. 

It is unacceptable that I cannot find a way to speak with O2 themselves to get help. 

I am considering changing providers due to this. 

I cannot even call O2, or pay my bill, as the phone will not receive OTP codes, or let me call them. 

Kindly, 

An aggravated customer

[MI5]

@Lillibet 

Some things to try:
Check data roaming is on in phone settings.
Manually search for another network
Turn off 5g
Change your data APN to "mobile.o2.co.uk"
Check with O2 whether you have a roaming bar on your account. Do this via social media
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.

Also some countries require 4g calling now. USA - Roaming with O2 and others.

[Enlli]

Where are you?

[MI5]

@Lillibet 

Countries with no 3g here 2G and 3G Shutdowns Continue (telegeography.com) so you will need 4g calling activated on your account.