Didn't realize you meant another thread here on TFL, so since the other one is closed...
A License to Purchase a Pistol is valid for 10 days to purchase a pistol. The seller must sign the license and keep one copy for his/her records. An individual must keep a copy and return two copies to the local police department within 10 days of purchasing the pistol.
Did you return the copies?
There is an exception for a person licensed in Michigan to carry a concealed pistol. He or she must obtain a Pistol Sales Record (RI-060) any time he or she purchases or otherwise acquires a pistol, pursuant to MCL 28.422a.
Do you have your records to take to court?