Shocking customer service

Today is the 5th time I took in my Nissan Qashqai to Nissan Kimberley. As explained to me by the manager, the fault the car has (abs and master warning light illuminates sometimes and the handbrake doesn't grip properly) has to be fixed on a trial and error basis, as they do not know the exact cause. Although the car has been to Nissan 5 times I still have to take it back everytime the warning lights come on. I live on a farm and can't keep on taking a day off if the problem persists, I told them to keep the car there for a couple of days and fix the reoccurring problem, but I at least want a courtesy car then, I feel its only fair after having to return the vehicle numerous times. Riaan the manager agreed. I took my Qashqai 1.6 dci tekna 4wd, top class car in, and in exchange I received a Datsun Go, that is dented, dirty and reaks like a shebeen. I am paying for a top class car and now I have to be happy with that? Do you call that customer service.? Thanks nissan for really life time memorible customer service !