@Agnes, welcome in Orange Community!
I've noticed you didn't come back here. Please tell us if your problem was solved.
If not, let's recap, please! So, you have an Orange PrePay SIM card and you recharged 2 weeks ago with 12 euro, correct? Have you recharged with 12 euro credit or with an 12 euro option? Did you use the phone these 2 weeks (voice, data)? It worked? Are you in Romania or in roaming?
If nothing that was written here is helpful for you, of course you can call 300 (+40 374 300 300) choosing 1 for Romanian/ 2 for English; or you can call 474 for Hungarian.
Please keep us informed! Thanks!