Westlake Financial Services, LLC Refused to send me my refund check with the correct amount. Los Angeles CA

Westlake Financial Services, LLC accepted a Loan Guarantee from Geico in the amount of $25, 612.16 which paid off my loan entirety and included the service, tire and wheel, and gap protections plan of the vehicle. Westlake Financial Services request that the protection plan be canceled and refunds be issued to them. They received the vehicle service protection plan refund in the amount of $1,616.47, and the tire and wheel protection in the amount of $214.88. 

The refund for the gap insurance was mailed to me in the amount of $591.  On December 28, 2021 I received a check from WFS in the mail for a refund of $659.12 which was incorrect and no itemized breakdown came with it to explain what the amount entails. The guarantee letter stated that the insurance (Geico) would pay off the amount of the vehicle for $25, 612. 16.  and because my account was a total loss that the payoff amount would reflect the pay off amount from the date of loss which is September 9, 2021. 

I have not checked the refund check WFS sent me because the amount is incorrect and I am requesting that they fixed it. I told to numerous of people who tells me different stories regarding my account when I call. No one is never on the same page it always something different.  This company doesn't have a clue. They want you to get frustrated and give up so that they can keep your money. I don't think it should be hard to resolve this matter if there is one person handling  the account.