When any company or agency screws up your account or your orders,
causing some other company or agency to claim you owe it money, you
are likely to be screwed. It tends to be hard to clear up the error.
Here a British teenager committed suicide because he expected to be
given a fine he could not pay.
This was because court notices had
been sent to the wrong address.
You may have to go to court against the entity that screwed up, and
the other one (that demands payment) won't help you because it doesn't
care who is at fault. When this happens, the state should hold the
first one responsible for all costs, and should help you prove it.