So to summarize you posted something on facebook that was offensive and someone shared it with the tournament director and organizers of TPF and banned you from the tournament and from leasing a vendor space?
If this is the case can you please share the content of the post?
I'm assuming from the consequences and the fact you provided no details - it's either political, racist, sexist or all of the above. If so - the organizers of a private function have every right to not want someone that represents those values participating in their show. Can you provide more details on your complaint? The details matter.
Please share a screenshot of the post with us so we can make a better judgement.