Account settled but appears to be in arrears

Good day, I had two loan accounts with FinChoice. On 2022/02/25 I settled both accounts. On 2022/02/28 they debited my account. I then called them and explained what had happened and for them to refund me. They told me the money does not reflect in their account, I should wait for 48hrs. I waited still nothing happened. On 2022/03/02 I went to my bank and reversed the two payments that was debited on 2022/02/28. Since I reversed the monies I have been getting endless calls from FinChoice saying that my account is in arrears. I’ve been explaining to them what happened and one consultant said they can see that I made the payment but all the monies were allocated to one loan account and they will allocate it to the other account that is in arrears and close it. They still haven’t processed it and I’m still getting calls from them.