Add automaitic email response to wordpress eshop direct bank checkout

we currently have an ecommerce site set up using wordpress and the eshop plugin. one of our payment options in direct bank transfer, but when people select it as their payment option they do not receive anything until we send them a manual e-mail with our bank account details. I would like this modified so that when a user checks out using our direct bank transfer payment method an e-mail is automatically sent to them with their order details along with our bank account details with payment instructions.