I recently bought a used motorcyle at a shop in Tampines 9004,  After numerous complain of my bike condition eg: Brakes not working properly, engine overheat, water leakage – This shop avoid  liability – refuse to repair and tell me there is nothing wrong because he can ride. 

On the 2nd month when i go to pay installment – he says i m 5 days late – late payment interest charge is $20.00.  When i question him what is the interest rate? He couldn’t reply, He says late means at least $20.00 .( for $222.00 instalment)

Can anyone tell me, is this reasonable? Of course I wont be late next month – Thanks.