Why is betterment applied to my claim when in actual fact, I am entitled for full compensation? What is betterment?

Why is betterment applied to my claim when in actual fact, I am entitled for full compensation? What is betterment?

Betterment is a scale (%) imposed to the vehicle aged above 5 years when new franchise parts are used during an accident repair that was paid by the insurance company. The insured will have to bear for the betterment charges because his/her vehicle's old damaged parts were replaced with new franchise parts since the motor insurance policy only indemnifies the insured's vehicle in the condition just before the accident. The application of betterment is at the discretion of the respective insurance companies based on the Scale of Betterment approved by Bank Negara Malaysia.