Hi,
You can't get rid of the page.
What you can do though is to provide the URL you would like to be indexed instead.
For that, go in the products listing of your backend, and click on the "root" link on the left side explorer.
There, click on the "product category" category in order to edit it.
There, you can provide the URL you want to be indexed instead in the "canonical URL" field.
That way, when a crawler like Google tries to index the wrong URL, it will see that canonical URL provided in the headers of the page, which will tell it that you don't want the current wrong URL to be indexed and that it should instead index that other URL you provided in the "canonical URL".
Then, you just have to ask Google to re index that wrong URL and once it does, it will be removed from the search results.