If you have the two-wire-version it will work definitely not with the servo-library.
This motor looks like a servo but the two wire-version is not a servo
This company is bad on documentation. at first glance the website looks like explaining all things but it doesn't.
The two wire-version must be driven not with the servo-library but with function analogWrite()
About codetags: make the code look like this
this is text
formatted with code-tags
use the </>-Button
best regards Stefan