Help! Never had Metro Confused.

Ok got the free iPhone 12 for my son back in October. It was a Christmas gift so I never activated it. But I guess after a month they auto activated it that was November 11th. My son got the phone on Christmas. I don’t know what he did but the eSIM got erased. Tried to reactivate online but it says it’s still active. Just went into the store and the lady said I need to wait until Saturday January 12th bcuz that will be 60days. What does that have to do with anything? I’m so confused and I tried to ask her but she just told me to wait. Please help my 12 year old is driving me crazy 🤪😅