Można np. tak:
We regret to inform you that due to your last week's overloaded cargo from Thursday 4.09.2008 we have to ask you to pay additional 150 euros (for our services).
According to the carrier you have loaded 59 colli onto a truck which was supposed to carry up to 5O colli.
We are forced to charge you extra since the carrier is going to charge us 150 euros more for the overloaded cargo.