I don't appreciate my birthday gift
Why don't you like it?
I thought I was getting a different gift.
Being given a gift is something to be grateful for, even if it's not what you specifically wanted. I think you should think about who you received it from and why they gave it to you. You might appreciate it more then.
I wanted a true replica Japanese katana and I got a fake.
It is rude to not be thankful you got a gift. Not everyone can afford or find an authentic sword you want.