@kennytest:
1. Well, web design is is an expertise like many others, taking some time and practice to learn. So, if you can't do it yourself, you may want to consider hiring a web frontend designer to do it for you.
Here it's about features and functionality of the HikaShop extension, and even though one or the other help for specific element styling is provided, I understand it's beyond the scope to do entire pages or even sites, sorry.
2. Did you try setting Bootstrap to yes in HikaShop? If you did and it didn't work, I gave you some hints on what to do. If none of them are options for you, the best would be to consider switching to a similar Bootstrap 2.x template.
After all, Joomla 3.x is set for Bootstrap 2.x only, and so is HikaShop. Means with a Bootstrap 3.x template you can likely run into issues, particularly with responsiveness, and that's true for quite many other extensions, too. Sorry again.