MBD/EDGARS not updating my account on ITC

My Edgars account was handed over to MBD in 2018. From October/November 2018 I have been paying them R500 a month. In July 2020 I settled my account by paying a balance of R1052 on the account but when I called Edgars I was informed that I owe about R350 on the account which I paid at Jet stores at Umlazi.

Ever since I settled my account I have never been given a settlement letter by MBD or Edgars. They are both giving me a run-around. MBD says they cannot give me a settlement letter but Edgars should provide that to me. When I call Edgars they say MBD must provide me with the settlement letter.

My account on ITC is not updated it still appears as if I am still owing R7447 which in my knowledge I have settled.

I don't know what to do now. What can I do do to get this matter settled?

Regards Ntombi