Your posts were blank @kevino5533 and the subject line doesn't really explain things clearly.
Why do you need to add €3?
What exactly do you mean by "get back coverage"?
If you want to add cash credit to your account or buy an add-on (€3 for 1GB data?) then see here:
If that doesn't work then you'll need to explain clearly what happens - e.g. what goes wrong and what error messages do you get?
Bear in mind that add-ons only work when you also have an active membership plan.
And cash credit alone doesn't give you the ability to make calls, send texts and use mobile data.
Do you have an active membership plan?
If you need to contact 48 support about this then see the links in my signature below.
