Money reversal dissatisfaction

On the 15 of April 2019, I had accidentally transferred an amount of R1000 instead of a R100 for my DStv subscription I then asked for a money reversal, however when I contacted Multichoice I spoke to one of their consultant and was told to forward certain documents of which I immediately did. It has been over 23 days and I still have not been assisted, I call Multichoice on a regular basis and they push me from pillar to post. I am not satisfied with their service more so because this is MY money that I am requesting back.