Easy Pawn

I have a Bulova watch in *** *** for over a year making my interest payments every month and I payed my interest last month (5-05-2018) on this watch I go in today to pay my interest my watch and the salesmen told me they put the watch out for sale , I never went over the day deadline for pawning anything so how can they take my interest payment for over a year and then take my watch when I just payed on it 5-05-this was last month I payed on it Need your help with this issue Revdex.com THANK YOU