Stop orders not due each deducted 21 times!

On Thursday 7 May I went to Standard Bank Blue Route. I reduced 3 stop orders which were in support of my church & missionaries. These stop orders are taken off my current account at the end of each month. That was done efficiently or so I presumed. On Saturday morning, 9 May, I noticed a whole lot of SMSes from Standard Bank & went into my Standard Bank app. I discovered that the 3 stop orders were deducted from my account on 8 May, not at the end of the month, & that each stop order had been deducted 21 times! Over R37 000 was deducted from my current account sending me into a huge overdraft. I went to the Bank straight away & reported the matter & the lady who dealt with me acknowledged it was a Bank error & said they would attend to the error on Monday 11 May. I asked her to reverse all the stop orders but she said the Branch cannot do that. Some other department would do it. She also escalated the problem & notified her manager & Standard Bank IT as it appeared to be an IT fault. I also notified all the beneficiaries of the stop orders & said the unexpected windfall was a Bank error & that the bank would reverse the money. On Tuesday 12 May I saw that the stop orders were not reversed. I waited patiently. On I think Thursday 14 May to speak to the lady who had helped me. She was busy at reception & I was told she would phone back. She didn't but her manager phoned back that night or Friday & said they were attending to the matter. When nothing happened I phoned Customer Services & they said they'd look into it. Nothing happened. On Friday 22 May I phoned the queries number (***) on the SMS Service request & got through IT. The gentleman was helpful, took down all the details & I think consulted someone. He opened another service request. He also said that IT cannot reverse the money & that had to be done by the Branch. That contradicted what the Branch told me. Next day, Saturday 23 May I went back the Standard Bank Blue Route & spoke to one of the managers. He said they were dealing with matter & would phone me back. It is now Wednesday 27 May & he has not phoned me back. I asked him if the 3 recipients of the extra money must send it back to me & he said no, the Bank would do that. I also requested that when the Bank gave me back my money they also reverse all the overdraft interest charges. All this has cost me a lot of my time in a very busy period plus phone costs plus travel costs to the Bank. An inconvenience fee would be appreciated. I have been a Standard Bank customer for 40 or more years & do not expect this poor level of service. John Child ***