Schengen visa 16days overstay 3 days, a lot of fine

[myDNA]

unintentional overstay, Chinese, biz trip, this Sept, no knowledge of period of stay, invitation letter for visa application is one month, the visa state the period of stay is 16 days, in Zuerich stopped by the police and asked me to fill in some papers, including an argument paper, pay money as deposit, but didn't give me anything or any information, including the info for appeal, only asked me to keep the payment receipt for one month, nothing on visa. Up to now, I have no verdict/no judgment/no paper/no call nothing received yet, but the fine already on my credit card account. What will be happened next, will they return the fine to me?

[porsche]

Your case has been closed by the mere fact of paying the fine. By paying the fine, you have admitted that you agree with the finding of the border control and with the imposed penalty, and you have cleared yourself of the opportunity for an appeal in the administrative proceeding. It is the same as with paying a ticket for wrong parking to the police officer.

Can you share how many days you have overstayed and the amount of the fine?

What exactly do you mean by "argument paper"?