Ford Credit is sucking me dry...Pls help!!

Good day...I have a complaint about the way Ford Credit is handling my account. I bought a car in June 2021 using their service. In 2023 due to trouble in my finances because of high interest rates at the time...it became hard for me to keep up with rising increase in repayments , therefore I asked for a decrease in repayments or a change to fixed rate which they refused. After that I sort for help in debt relief...a decision I regret to this day! My complaint now is that Ford Credit is still charging me interest as I have noticed that more than half of what I pay still goes towards interest...I have a problem with that because I feel that this is too much. Pls help me make them review my account. Thank u.