Sorry this happen to youBut the mistake is not of samsung in this case because most of phone on amazon are use or repack like original can't trust amazon or flipkard for electronic devicesOn amazon they try to sell use devices in cheap price compare ...

Is it nepal?

Don't expect much from costumer supportThey won't help you

You can use it but if you remove the card from the old device and then trying to register in new one then it take time

The card has not been removed from the old device yet so you are not getting any otp so just wait for a month then try again and it will work