Word: 投诉 (tóusù)

客户的投诉你们跟进了没有？

Kèhù de tóusù nǐmen gēnjìnle méiyǒu?

Have you followed up on the customer's complaint?

我已经厌倦了你的投诉。

Wǒ yǐjīng yànjuànle nǐ de tóusù.

I'm tired of your complaints.

菜里有头发，我要向经理投诉。

Cài lǐ yǒu tóufa, wǒ yào xiàng jīnglǐ tóusù.

There's a hair in the food, so I'm going to complain to the manager.

这起投诉后来不了了之了。

Zhè qǐ tóusù hòulái bùliǎoliǎozhī le.

That complaint was later dropped without ever being settled.