The last time, the amount was $100. Have you tried to disable automatic carrier selection to see if that can help? As well, disable data roaming. 

Anyway, I will flag a rep to look into it

thanks. I just turn off the network selection.  so when could you cancel this 198 dollars bill

Hello @will_iam_yu 

Sometimes the device is going to catch the network on the other side.

It's a world-wide situation, since the device settings are set to automatically search for the strongest signal.

You can change that in the settings of the device and set it to Manual Network Selection, after it's done searching, you select Koodo and it stays connected to Koodo, even near the border.

I would also advise to keep Data Roaming off while in Canada. This will avoid any accidental charges. We have a great help page here: https://community.koodomobile.com/plans-services-232910/easy-roam-understanding-how-you-will-be-charged-while-traveling-7811296

We verified the days with the charge and confirmed accidental roaming. A credit was applied for the fees and will update within 3-5 minutes in the Self Serve account.