Double Charg

On Saturday the 24th of October 2015. I bought a cellphone @Edgars Pavillion. The initail transaction was denied because of some register error therefore I asked that it be re-done. As soon as the second transaction was approved, the first one also went off on my bank account and I advised the cashier, who wrong that down on the declined slip that I was double charged. When I asked what will happen to the money she advised me without any uncer*****y that the monies will be reversed that day but nothing happened until monday so I called in and spoke to a gentleman in accounts who advised that the transaction was being processed back into my account, on the very next day i called in again and spoke to the same gentleman who advised me that I needed to come into the branch with a bank statement detailing the 2 transactions that went off and if this was true i was going to receive my money the instant i produced those documents. I did that however the manager there advised that he still has to log in a call with God knows who and he'll get back to me the instant that call was made and 3 days later nothing has happened the stores number is constantly engaged. And I'm the one suffering.