Chocolates from the Deutsche Bahn?

There was a big package came in the mail today. From the Deutsche Bahn. Inside was a tin of hand-made chocolates and a letter apologizing for the train delay I experienced the middle of February when the trains were stopped/rerouted because of a supposed bomb threat.

Now, I already filled out the forms and got my 5,75 € refund. I asked for the refund as a certificate to be used on my next trip, except that it wouldn't accept the certificate for payment on my next trip. I cursed the DB, why can't they get it right like that bookseller from the States that I used to use? But I didn't write a bitching letter (or I have started writing them in my sleep). So do they have my laptop bugged, or did my Prof. Dr. dazzle them?

Whatever. Good chocolates.