Need to pay for Doxyme via invoice going forward

In the panic of having to get this rolling very quickly, we started our clinic account on our company credit card. We are moving from 10ish doxyme accounts to over 60 this week, but we of course can’t be putting 30+ thousand dollars on a credit card, so we need to move forward with an invoice method going forward.

How do we change our account from using a CC# to being invoiced from your billing staff?