Translation of Sparsamkeit

So you have taken a German course in the Ghoete Institute. Well, I certainly learned something with you, and your German is already a lot better than last time. I think we really did it.
But now the other department of the same company made an update to their policy and it seems that they punish all agents that give away too many fliers at once. I will probably have a few corrections to make and I hope that income recovers soon.
Thank you for your email, everything was crystal clear. We should call each other, this would be the best way. Do you have the same opinion? But I think I need more help, for example: how do you conjugate swim?