bad attitute and horrible and rude client service

my father is a client of African bank and has arranged to payment of 2000 and this morning they deducted 4000 of which my father cannot afford to pay and this was done out of his will after he tried to make an arrangement with African bank that the instalment must be reduced because he is now on pension and the rude Kgomotso told my dad that they cant reduce the instalment and that my father can afford to pay 2000.who on earth is kgomotso rakololo?my father is on pension with less income and a house hold to run and kids to feed and school fees to pay,he did not say he wont pay but he wanted to negotiate low instalment for goodness sake and that is not a crime according to the credit act.my mother wanted kgomotso to transfere the call to the managers and she refused saying there is only supervisors and hey wont assist all my dad needs to do is to pay..she was so rude and we cannot tolerate such behavior and treatment from African bank and their ***********,rude staff who prey on pensioners and don't go according to the credit act where the consumer is in a state to negotiate. this is unacceptable cos as we speak now my dad had a heart attack cos of that rude unproductive call.