Edit drupal 8 custom model

Hello I have a custom module drupal 8 site that need some extra function in breadcrumb section i want a more detailed one when inspecting a node in this case its a product that has a brand name and a group under that brand , so after home , brand (brandId) and group (groupId) shall show up then product name. The module named "products" arranges products according to their brands and groups under those brands for ex a bmw car goes under brand bmw and a group lets say electric cars , that all image 1 shows the current situation when we are in the group page in this case batteries , image 2 shows a chosen product page , both with drupal default breadcrumbs block which we wont use after adding our own block in that section which is now installed over the 2 images it shows what the actual breadcrumb link should look like when done. the module is attached with this task if you wanna check it to make sure its understood and make sure its doable. image 3 shows the place where the code is needed to add groupId and brandId , inaddition to that, a couple of if sentence after it to make sure if no brand available it still show group then product name home>groupname>product , same situation if no group if found home>brandname>product . group and brand are tag added to each product when adding it to site current situation shows wrong id , from image 4 you can tell why image 4 is also shows where the code sall be placed to show brand and group of products