Apple iPhone 13 Pro Max (Unlocked) (Black Box - Like New) (Open Box)

I bought this device for a relative who would use it in Peru, according to its characteristics this item was completely unlocked. Before its purchase, I was looking for information about what kind of unlock had and I found 3 affirmative answers indicating global unlock (including my country). When my relative tried to use it over there this cellphone was locked by its carrier in the U.S. So we contacted Amazon Support, for some information about it and they recommended solving this issue with Apple Support directly or returning it (the phone is in Peru currently). We called Apple and after 45 minutes, they confirmed that the phone was locked by carrier but it could be used in U.S. only. They apologized because couldn't do anything else because it was Amazon's (or its dealer's) responsibility and they would be able to apply that unlock to be used abroad. I am expecting for the phone to return it immediately. I think the information is not complete or incorrect because I was looking for a good reference before its purchase and here we are. UPDATE 1: I've already returned the iphone. I am expecting for my refund. UPDATE 2: The refund was applied. Finally, I had to go to an Apple Store to buy a new one. Currently, it is working very well and I think after this experience, it is recommended to buy a new one directly. You may waste a lot of time in the whole process.