Debit card Authorization

Standard bank experience was smooth, but recently the past two months standard bank has been double deducting in my account for debit card purchases, theres this debit card purchase authorization thats happening for all my debit card swipes. Money will be deducted after purchase then few days later again the same money will be deducted, this happens frequently now, steers,shoprite, petrol station, motor spares, spar. Its really disheartening. Im only realizing this now after carefully evaluating my statement to note that i have been double paying on purchases made with debit card. Launched a complaint about this even now no responses