unreasonable

I told him that I wouldn't pay unless he sent me a replacement. Am I being unreasonable?我告诉他如果他不给我换货我就不付款。我这是不讲道理吗？

You are entitled to compensation for unreasonable delays.你有权因不合理延误得到补偿。

unreasonable demands/expectations不合理的要求/期望

The prices were not unreasonable. [=were not too high]这个价格还算合理。