Jewellery website with logins for customers

Need a jewellery website with their gold schemes in it. Scheme is if they pay for 11 months 1 month will be paid by the company and by the end of 12 months they will get the gold worth their money. Customer can login to their page on website and check how much money accumulated. Month wise details should be available on their page. if a customer pays by cash then admin can be able to enter it into the customers profile so that it can be reflected in their page when logged in. Payment gateway should be integrated so that any customer can pay online if they want.