Telkom does not refund my full deopsit and rude credit management personel

If there was a ZERO that would be my rating. I cancelled my fixed line and ADSL line 31March 2018. I recived my last account and Telkom duely deducted the debit order amount due. I am now waiting for my R700.00 deposit to be refunded to me. In May I only get a refund of R 115.49. When I call and ask why the full amount has not been refunded no one can tell me. In ant case the query is re opened on the 02 May 2018 Ref: ********** 8. Today 08 May 2018 I get a call from some creature to tell me what I already know that Telkom has refunded me R 115.49. When I ask her why the full refund has not been done she tell me that she just put in my ID number and the system told her that is what is due. On asking whether she had bothered to check my account and verify that the refund is correct and tell what it is that I was owing Telkom since my account is always up to date she goes on to give various excuses that she cannot see my account and different systems being used , so clearly NO effort was even made to resolve the query - just put an ID number and the machine will tell you even though you are querying the very thing that the machine has told you. This woman than just promptly told me that she was closing the query and put the phone down in my ear as I was still talking. Unfortunately I did not get her name but she is in credit management, clearly just a pencil pusher there. I want to know from Telkom why my full refund of R 700.00 was not done.