DEDUCTING MONEY FOR AN CCOUNT THAT WAS PAID IN FULL 3 WEEKS AGO????

so once again ABSA disappoints in a major way. so after 3 months of issues regarding changing debit dates and pointing fingers and deducting money from my account on the wrong days and say they have fixed the problem. so to my surprise noticing that ABSA deducted money once again from my account even after i paid my outstanding loan amount 3 weeks ago in full, and now it is stating my EX Loan amount is in the positive please explain to me why you would deduct the loan amount when the loan has been paid in full and now im that amount short. is this being spite full, or the ABSA staff have no idea what they are doing and dealing with other peoples money???? but ABSA is very quick to jump on the high horse when they just deduct money from accounts and play dumb??? does this mean ill have to beg ABSA to refund me my money they so kindly took out of my account without permission and now it will become my problem and wait for weeks at end so they can fix there mistake once again????? what reason do i have to stay on as a loyal client when things like this keeps happening over and over and always gets put straight on me and they never take responsibility and we just have to deal with it????