How can we change the pay mode and the email only for the invoice?
Could you please specify, which pay mode would you like to change? You mean adding another credit card? Such info could be change following the next link: https://www.2checkout.com/va/sales/customer/change_billing_method
As for the invoices, you need to make requests in our system to receive them, since there is no automated system by the moment.
Customer support service by UserEcho