Hi@Cia Lerr Chua ,
You can go to https://www.office.com/ and sign in, then you can find Install Office option, you can refer to this support article to get more help:
https://support.microsoft.com/en-us/office/download-and-install-or-reinstall-microsoft-365-or-office-2019-on-a-pc-or-mac-4414eaaf-0478-48be-9c42-23adc4716658
If my understanding is incorrect, please provide more information and I'm glad to help you.
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