ABSA PAY BACK MY MONEY

I have app**** for an absa personal loan. I was at fault not to pay end of december I have made a arrangement and entered intk an agfeement to have a double debit en of Jan I put money in y account and there goes my money. I did not consent for them to take my money TODAY 06/01/2016 but the 27th and at the the 27 ill have double debit... when phoned numerous times their helpless call centre can just advise me my account is still in dept BUT I NOW HAVE PAID def switching banks