Relevant content to exclude a vocabulary

Hi!

I'm using Relevant Content right through my site and loving it. There is just one small thing I cannot get my head around please.

Example: a press release has the following categories:

(country) south africa, western cape and (content category) commercials

which appear just below the title. Fabulous, when I click on any of the categories I go through to all press releases related to that specific subject.

Now in the 'Relevant Content' block I get all the articles of south africa, western cape and commercials. But would actually only like south africa and western cape and not commercials. Obviously to have content appear only by (country).

Is there a way to exclude (content category) please .. would most appreciate any direction on how to do this.

All the best,
Lilian