Concerning about high charging over my prepaid sim card

Hello ​@yadaaaaa.x,

welcome to our o2 Community 🙂

I could take a look, the 30 € you transfer are accounted for, it might be that there was a lag in your customer account so that it has not been shown then.

Have you checked today?

Best Regards,

Gerrit

Hello,

I would like to ask for a detailed explanation of the charges on my o2 Prepaid S account.

According to my payment history in the app, on 08.05.2026 I topped up my account with 20 euros. Normally, the monthly fee for my o2 Prepaid S plan is 9.99 euros, so I expected that after the May fee was deducted, I would still have around 10 euros left for June.

However, when I checked my balance yesterday, I saw that my account was –17 euros. Because I did not want any problems with the June renewal, I topped up again with 30 euros. Now my current balance is 12 euros.

This means that for May I effectively lost 37 euros (10 euros normal monthly fee + 27 euros more), but I do not understand what the remaining amount was charged for. I also see entries called “Rücklastschrift” and “Rücklastschriftgebühr” in my payment history, but I never received any clear email or information about these charges.

Could you please:

1. Explain in detail how my balance went from +20 euros on 08.05.2026 to –17 euros before I topped up again.

2. Clarify why the total charges for May appear to be 37 euros instead of the regular 9.99–10 euros.

I will look forward to hearing from you.

Thank you.