Or when O2 suddenly switches your (platin customer) plan to the less good plan which doesn’t include 1 GB free roaming in world zone 2 (eg. Switzerland). So you just at some point get a message you used your ~60€ max capacity for background apps, for two persons plus the usual bill (45€) ≈ 180€. Then customer service tells you they’ll change it back, and you’ll not get charged for the used data - except they used an advanced technique there called LYING.
Or when O2 suddenly switches your (platin customer) plan to the less good plan which doesn’t include 1 GB free roaming in world zone 2 (eg. Switzerland). So you just at some point get a message you used your ~60€ max capacity for background apps, for two persons plus the usual bill (45€) ≈ 180€. Then customer service tells you they’ll change it back, and you’ll not get charged for the used data - except they used an advanced technique there called LYING.