Hi ​@Froggy,
I am very sorry to hear you have incurred costs outside your bundle. Turkey is considered zone 2 and does not fall within your bundle. Therefore, the costs in Turkey are €5,- per MB. Unfortunately, when travelling abroad, turning on your internet after landing could cause data usage. This is due to apps that refresh in the background (think of all the notifications you received when you turned back your internet) To avoid this, you could turn off the option '’Roaming'’. Additionally, the data cap is only valid within zone 1. However, I would still like to take a look at your subscription to see if I can help you in any way. Could you send me a private message with your personal information?
Greetings,
Seren