I need a e-commerce website

Hi, we are looking for someone to take our Wix site and transfer it onto a different platform which is must faster with better integration for Royal Mail and an E-Pos built in app if possible. We want to be able to modify and add inventory, special discounts etc. At the moment with wix sites it has mobile and tablet view which is something we also need. We have Google ads, analytics, automatic emails etc already integrated so all this would need to be transferred. Our current domain is www.alnoorclothing.co.uk. If you need anything else pop me a message and i can give you my number. Budget can be negotiated not a problem.