Poor customer service from Honda SA and Centurion

I bought a new CR-V in 2012 from Centurion Honda. Two days ago about all the lights on the dash board flashed and the car lost power. I phoned Honda Centurion immediately and took it there. The technician reset everything and told me it is fine. Yesterday it did the same and we took it in again. They borrowed me a car. Two hours later they called and said I can come and fetch my car. I returned the courtesy car. The technician told me they ordered a part from overseas and I can use my car till they can fit it. After 10kms today the exact same thing happened as yesterday. You have to stop and switch it off for a while before you can drive further. It is a very dangerous situation in my eyes, because I sometimes work late. They are not willing to supply me with a courtesy car for the period. I am most of the day on the road and it is a loss of income for me, as I am self employed. They are not willing to give me a written approval that they will cover any other problems that can occur if I use the car till then. Honda SA says I am on a waiting list for a courtesy car. In my opinion Honda doesn't walk the extra mile for a customer, although I explained my situation to them.