Build an Online Store

I want an online marketplace that will function more like aliexpress, but will have unique and better look than aliexpress. It will also have a wallet that will work like escrow built in it, that both buyers and sellers will use. The wallet will show the amount deposited by the buyer in the buyer's wallet and the seller will also see it that the money for his/her item that the buyer wants to buy has been deposited. If there is no return of the purchased item by the buyer within a stipulated period of time, the money leaves the buyer's wallet and deposited to the seller's wallet and forwarded to the sellers account. If there is a return of item purchased by the buyer, the money should remain in the buyer's wallet and buyer should have option of refund or use the fund for another purchase. More details will be given when the project is awarded.