Don't care about customer service Standard bank

A bank that does not care about their customers.... I accidentally sent money via normal transfer on app last night to a capitec account.... Up to this morning I did not receive a confirmation email I then went to the app to check the account number only to find that instead of 10 numbers I put in 11 numbers.... And chose correct bank... App accepted the money and transferd the money . I then called call center to see if I could request a recall... Consultant I spoke to said even if I chose the correct bank.... Standard will send it to whichever bank that uses the same account number or it will bounce back if it does not exist... So my question is how does it accept a wrong account number even though I choose the right bank...... So at standard bank there is no room for error