i got friend working for HSBC loan department application

I just made a personal loan of RM 6k from RHB Easy today. Actually I intend to choose 1 year tenure, but during the registration process the staff there said he will make it 5 years because their system might reject the application if the monthly repayment and my monthly pay ratio deemed unsuitable. Then he said I can one-shot settle it after 6 months, with rebate.

After the loan is approved, I'm quite surprised to see the total repayment amount of RM 10356.60. So I want to know how much is the rebate from RHB if I repay the loan after, say, 1 year instead of 5 years. I'm worried about the rebate being too little, coz had I really forced for the 1 year repayment,  only had to pay around RM 800++ extra, compared to RM 4k++ extra

p/s: this is my first time getting personal loan