Money paid into the wrong Absa account

My husband has an account with Capitec bank. He paid money into the wrong account by entering one wrong digit. He contacted Capitec telephonically, via Client Care Centre. He sent e- mails and went to the branch but no joy. Everyone refers the problem to someone else, no feedback. He now has two incidents numbers: ***4 and ***8 but still no feedback. Is your bank not supposed to be there for you as client? His cell no is *** Can you help please?