Renter moved out and kept keys and remotes

[Robert Cummings]

my renter moved out April 1st 2016.  he kept the keys and never returned them but sent the remotes back after 45 days or more.  I waited 3 days then changed the locks and purchased and programmed new remotes.  Then, 14 days after the 3rd, i sent the tenants deposit minus 3 additional rental days.  The tenant had left a vacuum which i stored in my garage in case he wanted it back.  The renter sued me, he wanted all his deposit.  He also wanted $350 for his vacuum.  I was late in getting to court and arrived just as he was called to the bench.   The judge, being angry at me for being late, awarded the tenant $1000 plus court costs.  I should not have been late but am appealing.  Question is was I correct in charging the former tenant for 3 days of occupancy beyond their scheduled move out date?