Ecommerce website

We would like an ecommerce website to run alongside our existing online business. Most of the html for the pages has been created using responsive templates. We would like to be able to edit the css (colors, fonts etc.)

The site is similar to:
https://www.zafferanoeshop.it/en/

We need to include the following:
- Multiple currency options
- Delivery in the UK as well as internationally
- Color and size product options
- Customer registration and login
- Wishlist facility
- Search function
- Blog
- Newsletter signup for Mailchimp or similar

The following are the existing template pages:
http://afriqdesign.com/shoptest/index.html
http://afriqdesign.com/shoptest/register.html
http://afriqdesign.com/shoptest/login.html
http://afriqdesign.com/shoptest/wishlist.html
http://afriqdesign.com/shoptest/cart.html
http://afriqdesign.com/shoptest/checkout.html
http://afriqdesign.com/shoptest/blog-details.html
http://afriqdesign.com/shoptest/blog.html
http://afriqdesign.com/shoptest/contact.html

Our website is:
http://afriqdesign.com

We are open to suggestions regarding which ecommerce platform to use.

Please provide quote along with completion time scale.

Thank you and we look forward to your proposals!