Standard Bank Poor Service and Ripping the poor

I was granted a personal loan around April, they started deducting on the month of May which was agreed upon. But they didn't deducted on the month of June, which I enquired at one of their branch on why they didn't deducted the amount agreed and the guy who was helping didn't have any clue to the extent that he asked me to wait for the month of July. To my surprise, I got messages from Stupel & Berman attorneys which needs me to pay almost double monthly amount agreed with Standardbank. The date agreed upon is my salary date, meaning the account was with more than amount needed to pay for the loan. But Standardbank decided to do it so that they can reap me off of nothing I have. That is a bad service which I am going to report it to the ombudsman. I didn't expect that from the bank I used since I was doing Standard 9 (Grade 11) around 1997