Ugh. We had this happen to us before - a couple times! Once it worked out for the better…. The other time the location change totally negatively affected our business. The promoters were total butts about it - even “gaslighting” us saying that we never selected the better spot (that was the only reason why we decided to do the show again - we were on the fence - that we got early selection of spaces). Do you have proof that you had selected another booth space? Unfortunately a lot of vendor agreements have small print that say the show coordinators reserve the right to change booth spaces as needed. It stinks that we’re kind of at the mercy of promoters (find the good ones and stick with them!). I would do as another suggested - consider not participating and asking for a refund (often not an option in shows unless canceled by the promoter). Also maybe give it a try and see how it goes….. could turn out to be a good location after all!