Build me a multivendor ecommerce website and an app for pharmaceutical online business.

Ok , so my project requires a multivendor pharmaceutical website and an app in which the local pharma stores or medical shops will post all medicines they have and on the other side the customer will shown the nearest medical shop prices for that particular medicine it requires.

The aim is to deliver the medicines within few hours of the order .

I want an app for customers and another apps for medicine sellers.