If a toolbox doesn't exist in my matlab, how can i do about that?

Hello, As the title.

Anybody has such an experience?

[dpb]

That depends on what, specifically, "doesn't exist" refers to. If it isn't part of the license/purchase for the particular installation, then the choice is do without or buy a license. If the particular toolbox was purchased but not found it's an installation problem or license. TMW official support can help w/ that.