If you are not happy about a repair, go back and complain.

如果你对修理不满意，就回去投诉。

《柯林斯英汉双解大词典》

If you are not happy, do you think I am?

如果你不快乐，你认为我快乐吗？

youdao

If you are not happy with your life then change it.

如果对自己的生活不满，就改变它。

youdao

if you are doing something that you hate and you are not happy, why bother?

如果你做自己讨厌的事情，就会不高兴，何必呢？

怡人的的汉普斯特德 - SpeakingMax英语口语达人

If you are not happy with their explanation, or think the figures are wrong, the Ombudsman will check that the firm has calculated any redress in line with the way their regulator requires them to.

BBC: NEWS | Business | Ask the expert special: Endowments

If something makes you poorly and you are not happy about it, don't just put it down to chance or fate - someone put the bug there and should be held to account.

BBC: Former Health Minister Edwina Currie quizzed

If you're not are you both compromising because your goals are to have a happy marriage with each other?

FORBES: Magazine Article