Moonstone Business School of excellence

I wanted to write my class for business investment and I made a booking with Moonstone, while writing I noticed that every assessment I wrote I get 55.5% of which the pass rate is 60% and you have to pay R575 for the first attempt then R402 there after but you don't pass and when I call them I get the same response "we don't know what went wrong and we can't help you review your answers, what you can do is pay another amount and re-write" of which I did and still got the same results and when I asked to lodge a complaint the manager is not available they will get back to me.

Unless I pay more money

Of which I paid 6 times already

Please help me