Hi and Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is
Welcome to Benefits and Work You should contact the Tribunal Service and explain that you were promised a home tribunal but have been sent a date to attend court. This in itself will probably delay things.
However, other than that, I
suspect the TS might take the stance that you have already had 12 months to prepare and 1 curtailed hearing, so should have everything you need. You have nothing to lose, and much to gain, by trying though!