noun
customer support
Refers to assistance provided to customers, typically by a company's service department. Common in business and IT contexts.
カスタマーサポートに電話して、返品方法を聞いた。
I called customer support and asked how to return the item.
このソフトウェアには24時間のカスタマーサポートが付
This software comes with 24-hour customer support.