Laws of Mathematics Do Not Exist?

If you believe that laws of mathematics do not exist, what would you do in the following scenario? Let's say that you walked into a bank and asked for change for a $100 bill. If the teller handed you only 2 $5 bills would you be satisfied with his or her personal interpretation of mathematics or would you appeal to a universal law of mathematics to show that he/she was wrong? I suspect the latter.

You see, you deny that laws of mathematics exist, yet you use them all the time. Unless you reconsider your position on this matter, your road to this site's proof that God exists ends here. It is my prayer that you come to understand how irrational and inconsistent this way of thinking is and return to seek the truth.