How to get the Sub Categories name on click of the Main Category in Category Page?

Hi All,

I am new to sharepoint and working on customizing the category page of the Contoso site. Currently the Category landing page displays all the products from the main category and sub category. 

From my research, the products on the category page, is displayed through CSWP with the Navigation term and their child terms.

But I want to customize the category page to display the Subcategories name on click of the Main Category.

From my work i got only one sub-category name (with some additional text added to it) as like the following,

GP0|#8abd65cd-c8b2-41eb-8804-852bdbf78970;L0|#08abd65cd-c8b2-41eb-8804-852bdbf78970|Mobile phones;GTSet|#ada48099-3568-4f57-8764-9d877bafa453;GPP|#39c4ce3f-9b5a-469d-a275-fb667cf46455;GPP|#9e769cc1-e045-4831-a4b5-df12359a0

I included theowstaxidProductCatalogItemCategoryfield in the Control_ListWithPaging.html template to get the above Bolded content.

I want to wrap this problem soon. Please help me. Thanks in advance.