Openvpn ecommerce woocommerce

Hello, I have a VPS server with OpenVPN installed and I sell accounts, I have a script that creates and destroy accounts and works perfect. I have my account bandwidth limitated too. This is the script : wget [login to view URL] -O [login to view URL] && bash [login to view URL] What I need is a ecommerce website where users can buy ovpn certs as digital products and then pay for as subscription (daily/monthly/3 months/6months/yearly) and of course this certs expires if user doesnt pay. When user buys/enter to its account can download its .ovpn file while its membership is active, if not cert is invalid. I need the cheapest solution so I think integrate to wordpress is the best way to go. I need to be able to add payment methods (Woocommerce plugins) so then users can pay its accounts. I need to be able to see and manage subscriptions too (create,update,destroy), so you can use another woocommerce plugin here to manage that. I have my bandwith limitation script too (2MB upload 2MB dowload per account) this is important : accounts must have this limitation as now.