Why do I get a cumulative bill for charging costs made in the past?

As a customer, you have made use of our charging network, which comes at a cost. So far we have not been able to bill these costs in a convenient way. With credit cards being enabled as a payment method, this changes. With only setting up a credit card once, monthly billing will be automatised. This is convenient, but also means there will be a one-off bill to settle historical costs that were not billed before.