Nedbank transfer

There was a missing payment on my credit card account..it was transfered via Old Mutual, so we rectify that mistake and the money was put into the correct account which is my credit card account the amount of R23200. But what I don't understand is the money was transferred 3 time like like it ended up to R67000 some change. And I phoned Nedbank to rectify that mistake and during the day it was rectified but my concern is all the charges was on me just because of their negligence..how can I be liable for someone's mistake? And the bank charges was very high..pls clarify that