Instant money

I sent a instant money of R4000 from my app, when the beneficiary try to withdraw the machine showed error but according to standard bank the money was withdraw successfully. I contacted instant money department where I was promised to get feedback within four working days which never happened. I called Friday got a promised that they sent feedback back before end of business which never happened. I called Saturday morning to be made to hold for 30 minutes while their trying to cook the verdict that the money is withdraw. Now I understand why most my colleagues are migrating to other banks.