transactions that cant be explained

A transaction went through on my acc on the 19th that I didn't understand so I phoned the call center and spoke to David and he advised me to go to a branch because he also couldn't understand what happened. I went to the branch on Monday and spoke to 1 of the consultant and he also didn't know what happened on my acc so he took my details and promised to call me back but he never did, so I went back to the branch on Thursday and I spoke to jabulani he tried to assist me but I wasn't happy about the answer after spending an hour @ the bank. I went back on Friday and jabulani suggested that we should phone the call center in order to get clarity on my acc and I spoke to Tshidiso who put me through to Ash who wanted to put me through to someone else but I told her that I couldn't stay on the line any longer because I had at the bank again for more than an hour so I had to go back to work. I ask her to phone me back ones she get answers for me guess what M still waiting even now. I even saw the guy who helped me the first time I went to the bank on Monday and Jabulani told that I was still waiting for his call he didn't even apologies. I am very disappointed with the service.