A Melbourne ice addict threatened to put a man "in the boot" if he didn't pay a drug debt, a court has heard.
Mark Andrew Brown, 29, of Kingsville appeared in the Victorian County Court on Friday over the violent kidnap, before the same judge who spared him jail just four months earlier for similar crimes.
"I tried to save him from jail and he goes and does it again," an exasperated Judge Michael McInerney said during his plea hearing on Friday.
"He's shown total disregard for the opportunities offered by the community corrections order.
"Some people never learn."
Brown pleaded guilty to assault, kidnapping and extortion with threat to inflict serious injury.
The crimes unfolded when Brown kidnapped a 26-year-old fellow ice addict who had drug debts he couldn't pay.
Over a 12-hour period last October, Brown repeatedly punched his victim, threatened to "go knocking" on his parents' door if he didn't pay the cash and forced him to call friends and his parents to lend him the funds.
During the ordeal, the victim phoned his parents saying he needed $5000 and the amount would go up every day unless it was paid.
His father screamed at the offenders to let his son go, refused to pay the ransom, and called police.
Brown then instructed the victim to apply for a loan, adding: "If nothing comes about by the time I come back, you'll be put in the boot."
When arrested, Brown denied kidnapping or injuring the victim and said he had no issue with him.
The court heard he was on a community corrections order when he committed his latest crimes.
Defence barrister Chris Pearson said Brown's violent, outrageous behaviour was fuelled by ice addiction but he was now drug free.
He said his client was anxious and depressed after cancer surgery years earlier and became addicted to tranquillisers, then ice.
The court heard Brown's criminal history was extensive, including kidnapping and extortion with threat to kill.
"There appears to be a modus operandi for Mr Brown," prosecutor Steven Ballak said, adding his crimes deserved jail time.
Judge McInerney agreed jail was warranted and will sentence Brown next month.