there's nothing, nothing you can teach me

Did someone buy me lj time? I had a Plus account; yesterday I noticed it is now Paid. I haven't had an email telling me I've had an account type change, and my account history doesn't say I've made any payments but nor does it say anyone else has made any payments. I am well confused (but glad not to have adverts for the next few months). So thank you if anyone did! But a general feeling of confusion pervades...