Determined to fail learner drivers rather than build competence on our roads

Very disappointing experience for my learner driver son taking his driving test in Krugersdorp. Examiner did not greet, warned him that he would make it difficult, made him do everything twice and then said, "you and I are going to fight today". Told him he had to complete his alley dock by stopping up the hill not at the white line as taught, so made him do that again. Understandably at this point my son was stressed beyond measure BUT had completed everything twice perfectly (according to test sheet received subsequently). When he stopped on the hill start after the alley docking, he did the first take off correctly but was thrown by the second request to stop again and do a second hill start. He rolled. He then failed. He then watched another learner doing their test with someone else and they drove over the curb but proceeded with their test. Their examiner was obviously more compassionate and wanted to encourage the learner and build a level of conficence. What happened to my son is just not reasonable. We want people to be responsible drivers. My child went for lessons, prepared well and was confident. He was polite and did what was asked, even having to do everything twice. But he had a rude insensitive examiner who was out to get him and was determined he would fail. He didn't stand a chance.

Can we (because I pay) really resit this test process again knowing that the one who passed was allowed to drive over the curb and my child who had a near-perfect score sheet failed. Surely we now understand what makes people consider buying their licences? And surely these types of examiners should be held responsible, to some extent, for the carnage on our roads? My child cannot go back to those testing grounds knowing that he may well get the same examiner. What are our choices actually?