Pathetic Telkom

Hi. Telkom is pathetic and the staff on chat support useless and untrained. I was forced to pay a R700 refundable deposit when I took out a adsl contract 3 years ago. I have cancelled this 4 months ago and since received 2 Invoices with R0. The invoice however reflects a R700 retained until final bill. Now I have received my final bill and yet nothing. Nobody contacts me, when I follow up with chat service they just say no credit reflects. One agent actually cancelled the chat as she can only see 2 accounts for me, I have 2 mobile accounts active, and said there is no credit on any of them the disconnects. It is pathetic how difficult it is to get any information out of Telkom for such a simple process.

What do I do to get this money back?

Should I go to the OMBUD????