Deposit to balance plugin

Hi guys,

I want to create an online shop to sell digital products. I know there are a lot of plugins that let you do that. What I’ve been looking for is a plugin that lets our customers deposit cash in their balance and use it to pay for products. I know there’s a premium extension for Woocommerce but it’s really too expensive and I am not willing to invest until I know my project will work. Do you guys know of a plugin that can do that?