Prevent phone from connecting to Turkish network

[sunmat]

I'm traveling in Rhodes, Greece. While I'm supposed to be able to roam free in Europe, I just realized that my phone has connected to Turkish operators from time to time and I have been charged for it. I have O2 Travel bolt on, so I see a 5€ extra charge for each of the past 3 days (basically since I arrived in Greece).

Is there a way to prevent my phone from connecting to Turkish networks?

I tried to manually select a Greek operator and while it works for data, my phone notifies me every 10 seconds (by vibrating) that the selected network is unavailable, so I just can't leave it on manual network selection.

I assume if I disable O2 Travel it's going to be even worse?

Also do you think I could ask O2 to cancel those charges since technically I was in the Eurozone?

[MI5]

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@pgn wrote:

Looks good, and not confusing.

However, pick Norway and PAYG and it still says 5G is available - but it isn't to O2 PAYG Customers (Yet!), @Dave-O2 

Ditto for Greece, where there is no 3G any more:

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and no 4g calling for PAYG customers so how do they make calls in countries with no 3g?

Yes we know the phone "should" drop to 2g but this doesn't always happen.

[pgn]

As noted:

https://community.o2.co.uk/t5/Discussions-Feedback/Roaming-and-5G-on-PAYG/m-p/1647324/highlight/true...