UDU listing me for a settled account. Why?!

I settled this loan with UDU on the this loan on 14th of December 2019, I shortly then sent them an email so they can send me a settlement as their contact center lines are not going through. On the 19th of December I was debited the usual installment and again on the 27th of January 2019. Much to my annoyance, I sent them an email every time I got debited with no response.

In February 2019, I reversed the one installment that they attempted for that month. Two days later, I got frantic calls and SMSes from rude MDB collection agents. I explained my case and every single one of them says they will get back to me with no avail. The last consultant I spoke to was Leonora Gomes from MBD who asked that I email her proof of payment settling the account which I have subsequently done, to date, I am waiting for the response. A refund of approximately R2700 needs to be done, a payment on bank charges incurred and all airtime expenses incurred while calling to rectify this is what I expect. UDU cannot treat me like this when I gracefully paid them. This is affecting my credit record and it is unpleasant.