Stupid prices for not much

I cannot fathom why their prices are so ridiculously high. We are a school not in a major enough centre to warrant a branch. The cost of the uniforms at this shop are exorbitant to start, and then they charge a ridiculous R150 delivery. It definitely does not cost them more than R100 to deliver 2 shirts. And if the stuff doesn't fit, we can return it AT OUT EXPENSE. But they have us by the short and curlies because there is no other supplier (somewhat *******, I feel). They also had no stock throughout December when I did have money for uniform. Now suddenly have stock and I have to beg, borrow and *****. The audacity. At that price, stock should be available always and delivered for free.