My partner passed a job interview, completed the training and trial shift, the boss was happy

This all took over a month, so it had been a month since completing his application and being accepted for the job. After his final training, he briefly mentioned having a disability to the recruiter. It would not effect his job but mentioned it just in the unlikely event that whilst on the job he became injured in the affected area as it was a mildly physical lazerquest job. The recruiter glared and asked if it would affect the job and he said it wouldn't. He then finished the training he was doing that day. Just two days later (bearing in mind that he had gone through a month of the training and trial shifts with no issue) he receives a text in which the guy says he was withdrawing the job offer. Of course he wasn't happy with this, so he organises a meeting with someone above his level. She then passes him on to the "complaints department". Turns out this complaints department is just a kid, the number being his mobile phone. He "investigated it", the outcome of this being "I asked him if he discriminated against you and he said he didn't, he actually had someone better suited to the job apply a MONTH after the application date, conveniently two days after the disability conversation, so case closed". I feel this is BLATANT discrimination and lack of professionalism with the complaints "department". He was offered the job, completed the training and trial shifts, then apparently after a month of the application date, someone else just happens to appear two days after revealing his disability. My partner does not want the job, if that's how despicable and unprofessional they are, but he wants some sort of compensation. What do people advise?