URGENT ACCOUNT REFUND

Good day on December of 2020 I mistakenly sent an sum of amount to my account instead of my vehicle account I have been trying to contact them they all giving me a run around regarding a refund I clearly stated that my vehicle account in on errors because I missed a payment I wasn't paying up my account because I have paid my monthly amount to my surprise they took the money and paid up account which I wasn't my intentions to pay it up its already 3 months and counting waiting for that money, I'm using tat vehicle to go to work to get that money that they need so if the means of transportation is erupted I won't be able to get to work because they repossesse my vehicle they do not get the payment