Complain to the staff first, then if the staff do nothing about it take it higher and complain about both the guy touching you, and the staff who do nothing about it. If they arent stopping somebody sticking their hands all over you, disabled or not, they shouldnt have a job there to be honest. You shouldnt have to put up with that soort of crap and they should make sure this stuff doesnt happen. If they dont complain to their bosses. And failing that, complain to the police that none of the staff or management are stopping you being molested. Seriously, disabled or not, it's still a crime.