@Dylan_07363 HI Dylan, to help prevent any further charges the first thing to do is:
Make sure that any apps you have downloaded don't 'Allow background data usage', this option can allow apps to still work even if they're not actively being used by you.
You can also turn off mobile data in the settings of your phone & as you've said you use WiFi to make sure that the WiFi + or assist (its name varies slightly depending on the phone manufacturer) is not turned on as this will use mobile data alongside your WiFi.
I can put a data block on your account & this will also stop the charge but this also means you would have to contact us back if you wanted it turned on again. Also just to note, if you do block it wifi will still work.
The last option I have is can change your plan for you if you're interested. This would stop the charges as our newer plans come with All You Can Eat data. Most of our legacy plans including our 3Essential plan have a limited amount of data allowance or not at all. The €2 Daily Pass is triggered by a data connection no matter how small. The daily pass was put in place years ago to prevent further charging. The pass has 200MB for €2, which was a great price back in the day before we introduced our All You Can Eat Plans. Without it, the cost is €1.01 per MB.
If you're interested in getting the block added or changing your plan pop me a PM with your full name, address, date of birth & phone number & I'll get this sorted right away for you.
