Do I really have to accept a gift if it is one of my phobias?
What is the problem with the gift you are getting?
It is really bothering me that I dislike the gift.
I think it is ungrateful of you not to appreciate the gift. You shouldn't reject gifts that people give you. Even if you don't like it, you shouldn't make it known to them  how you are feeling.
I just don't like the gift I don't want to hurt anyone's feelings.
I am trying to say accept the gift. Then you can take it home and get rid of it out of their sight. That way you don't look rude and everyone can have a good outcome.