'Mackenzie Friends'

Has anyone had experience of the use of a Mackenzie Friend in a Small Claims Court.

My son-in-law has a learning disability which makes it hard for him to process information and questions. My husband went to a small claims court with him last week over a dispute about an investment in his band back in 2003 which the investor now claims was a loan and is demanding a high sum plus interest.
Though he had requested a helper because of his disability the Judge ignored this and treated my husband with a high degree of arrogance when he shook his head to help sil when he was confused about a question. As it happened, the case was postponed, unebleivably as the claimant said he'd not had time to submit papers which had been due two weeks before the case. He now has the case hanging over him for at least another 2 months but at least now has time to find out exactly how one of these Mackenzie Friends can be used.