Vehicle repayment with splits

Good Day.

I am asking a few questions for the south african community who can assist.

I have a fixed asset, a vehicle.

My loan repayments on my statement reflects a full amount

EX - R5000-00

In that i have the following

Instalment  R3000

Service fee R1900

Vat payable R100.

How do i show the full amount with the splits ?

How do io set up a Service fee and how do i set up the VAT on this.

Thanks