Wesbank refusing to close vehicle account after settlement

Wesbank is refusing to close my vehicle account. I paid the settlement amount on the 6th February 2024. They did send me my vehicle documents but did not close the account because i paid extra amount so they must refund me before they close . The amount was paid in FNB app, savings account to Vehicle account transfer. They said i must submit proof of payment, which was hard to get as i had to go to a branch, i did went and they gave me the proof. however the account is still open and now in my account they are just deducting and write installment sell, they are not closing my account. This is affecting my credit score as it looks like i still owe that vehicle. can you please help. I settled my account with Nedbank, whatever amount was extra they just returned to me, Wesbank complicate everthing