You'll need to explain this in more detail.
Why does she need more data if she's on the unlimited data €12.99 plan?
Or is she on one of the cheaper legacy plans with limited data?
What exactly did you do to top-up her data?
Exactly what steps did you take to do this?
What happened? Did something go wrong? Any error messages?
What does her My48 account say about her current membership plan status, expiry date and mobile data allowance?
If you need to contact 48 support about this then see the links in my signature below.
