A family of Microsoft word processing software products for creating web, email, and print documents.
If the advertising or other statement by the vendor explicitly said that licensed (not trial) Microsoft Office is included in the package, contact the vendor (not Microsoft) to demand they make arrangements to supply it.
If there is no such statement, you have no reason to expect Office (or Microsoft 365, which is a subscription that requires activation on the Microsoft website) to be included. Office is not part of Windows and has always been sold separately unless the vendor pays the license fee.