Hello @lb9293,

Thankyou for your message. I can imagine you were shocked by the out-of-bundle charges! Have you seen our warning text messages go by? We always send 2 warning text messages. 1 at 80% usage and 1 at 100% usage of the internet bundle. In these text messages it is mentioned that you can continue to use the internet with a stable Wifi connection or that you can buy extra MB's via My Simyo. If no action is taken after receiving these messages, you will pay the out of bundle rate of €0,15 per MB. To get the most out of your bundle I would like to share the following link with you: Alles over je dataverbruik, MB’s besparen en je internetbundel.

It is possible that you just missed these messages and therefore were not able to take action. If the Internet is left on and something is playing in the background or your device is uploading, it can quickly become expensive since we do not have a data limit. If your 4G connection is stronger than the Wifi then it automatically switches to your internet bundle, this is also called Wifi assistance. To make sure you are only using the Wifi, it's best to turn off the mobile data at that time.

Could you send me a private message with your personal details? Then I will see what I can do for you in terms of costs! 

Greetings,
Amy