Standard Bank is the worst bank in SA!!!

Standard bank is going into my account everyday since the 15th debiting purchases I made over 2 weeks ago! Obviously I got paid a long time ago (when I made these purchases at the stores) and now I'm left with a negative balance on my account because there's no money. I called in and their excuse is that "the merchants didn't submit on time ". I told them that when I make a purchase at the shop it's not my responsibility to ask when they'll be submitting to STD BANK! I've been loyal to this bank for a very long time and now they're messing up my credit record. I told them to rectify this ASAP and they gave me a case number( *** )and promised to "investigate " and rectify but they're still going into my account everyday further increasing that negative balance. This is the 2nd time they're doing this to me and I'm definitely taking this up with the Ombudsman. I am livid and definitely do not recommend this bank to anyone! They just don't give a damn about their clients!