Hello, I am from Europe and I have received Iphone 12 from US as a gift. When I want to put in my European based SIM card in the phone rejects it 'cause the phone is locked to Verizon. I have contact with the original buyers and they say that this phone is fully paid off and should be unlocked, but it isn't. I tried calling and contacting verizon support via messaging, but no luck. Any help would be appreciated.
Edit: I have contacted Verizon via messaging, but had no luck.