Unauthorized transaction from Edcon on my Bank Account!!!!!

Good day,

During the month of September an unauthorized transaction of R816.89 went off my account with a reference that i could not link to anything? I reported it and a Gentleman by the name of Sechaba assisted me and advised that there was an error on their side and that the IT Department is working on it and my money will be refunded, the next few days my money was refunded, then at the beginning of October the same amount R 816.89 was taken AGAIN without any consent from me!!! Each time this amount went off i had charges from the bank (+- R180) as i had not enough finds for this transaction, i reported this incident AGAIN on Thursday (19/10/2017) but still no action taken???

I am really frustrated as firstly no feedback from Edcon as well as who is going to pay for the bank fees each time Edcon just decides to take money from my account? How can Edcon just take money from my account with no consent from me??? R 816.89 (+(R 180) might not seem a lot to some people but this is a lot to me and is not money that i budget for.

Please can i get some resolution on my situation ASAP.