Online purchase system - Help me automate my selling process

If you want to be considered for this bid, I need you to propose a solution rather than simply telling me how much it will cost. I Sell digital products online, all of them are monthly products. Hosting, Website Maintenance, SEO etc. I want to be able to sell online automatically to my clients using credit cards, but I also want to be able to put clients in the system manually if they pay by bank transfer for example I want them to be able to pay online, monthly, automatically and I want them to be able to add / remove new services in the account. I want invoices (branded) to be sent automatically and I want to be able to see all sales and manage the system easily.