absa making 5 debit orders for one loan

I was on arrears with absa with 1450 and my normal instalment is 2300 so on the 24 of march I got some monies from oldmutual and absa deducted the 2300 and 1450 on the very same day . and on the 01 of the april they deducted 257 and another 2300 , the story is bad cause I cannot pay my car and they going to take it as last month the very same thing happened and I had to wait for 48 hours to get my refund am realy frustrated because this has let my credit profile to be bad as most of my debit oders bounce when absa is taking more than they suppose to in ome month I am swiching banks and thanks to absa for nothing and thanks for the **** arrangements to call to make and for the *********** staff of faireglen who cant help with anything.