Unkown transaction on account

Hello Peter

I reported an unknown transaction that was debit from my account to ticketpro of R790 on Sept 28th to Nedbank credit card division. I was emailed a dispute form which I completed and emailed back but I have received no feedback or whatsoever. To my suprise my Nov-Dec monthly statement reflects charges of up to R730.35 which are accounted to "insufficient charge fee" on transaction that I supposedly made on daily basis. I did not utilise this card to make any transactions and have no idea where the charges come from. On attempt to contact them, I held on for ages and when I finally got through I was cut off, they did not even try to contact me. I feel ****** by the bank and completely helpless.