I'm not there and I didn't see any of this, so it's hard to draw conclusions.
My first question would be if you're sure that there is really hostility specifically directed at you, or if the people in the office all act this way with each other, and it's considered "all in good fun".
Assuming it's just you, what is there about you that makes them single you out? Do you dress differently from everyone else? Do you act unusual in some way? Do you come from a different country or culture or ethnic background? Do you have unpopular beliefs, whether political or religious or social or whatever? If you're different in some way, do you go out of your way to advertise your differences?
Just for example, if you are constantly lecturing everyone about why they should become vegetarians or take up weight-lifting or whatever, it's not really fair to be offended when people express disinterest or disagreement with your beliefs. But if you have unusual beliefs and you keep them to yourself, then you have a right to be left alone.
So ... what is it about you that people are making fun of? You don't say. You say it's a "false impression", but what is that impression?