Hot Wheels Rentals

They sold my boyfriend a scooter but before he bought it they changed the battery to the scooter they changed the chain so after a couple of days of riding it would break down so within the 30 day ...so when i bring in 3 times they got hostile n aggressive they machine put his hands on my boyfriend n wanted to fight because my boyfriend said they scam artists beacuse how they lady owner going to said 30 day warrenty n now theres isnt n make him pay 45 dollars for there error n on top of that she diddnt give him a tittle to sign