Luxury E-Commerce Redesign & Optimisation

I am looking for an experienced e-commerce website designer/developer to upgrade my existing UK website, Marie Minks. The website is already live and trading, but I feel the current design looks too basic... (Budget: £250 - £750 GBP, Jobs: eCommerce, Graphic Design, HTML, UX / User Experience, Web Design, Website Design, Website Development, Website Optimization)