Disappointed

A loan amount was disbursed on my bank account on the 14/10/2019 which was great cause I used it to settle my other accounts, however it was reversed a day later and left my bank balance on a minus. I contacted the loan department on Tuesday the 15/10/2019 and spoke to Phumzile who assured me they will revise the matter and also get her supervisor to call me back no later than the 16/10/2019 to give me feedback. I'm still awaiting feedback. I don't understand how a bank of your calibre could acknowledge an error on your part and does nothing to fix it.