Mental disturbed patient deprived his right of buying at tuckshop

My son has been deprived his right of buying at the hospital tuckshop, because of a reaction as he says ,he said to me I qoutr"Mon I made a mistake"??I asked did you apologize unfortunately he didn't.He's not in his right state of mind.My concern here is how can they deprived him to buy some goodies he likes and that makes him feels at home since he's been hospitalized for almost a year now.He was admitted last year 24th November 2020.Please help me .