STOP DOUBLE DEBITING MY ACCOUNT

Why do you double debit me for my account every month i have to go and reverse the debit order because you are not honoring the agreement that i've made with you to only debit me R300.00 but instead you even exceed the amount that we agreed upon and charging me even more that the installment that i have to pay to you. You need to fix your systems and apply to the agreement that we've made. Let this be your last time you take my money without my consent otherwise i will refer this complaint to the ombudsman because you are not honoring my contract with you. SORT THIS OUT WITH IMMEDIATE EFFECT!